diff --git a/project-context.md b/project-context.md
index 6f69a61..480ee6b 100644
--- a/project-context.md
+++ b/project-context.md
@@ -65,7 +65,7 @@ The UI definition of "peers at 100%" is an absolute count of `peers[]` entries w
 
 ## Frontend Architecture
 
-The frontend is a single page with module-level state in `web/app.js`. It polls every 3 seconds and fetches torrents and stats in parallel.
+The frontend is a single page with module-level state in `web/app.js`. It polls on a user-selectable interval, defaults to 3 seconds, and fetches torrents and stats in parallel.
 
 Important patterns:
 
@@ -83,6 +83,7 @@ Current sort keys:
 - `progress`
 - `ratio`
 - `size`
+- `speed`: orders by combined download and upload speed descending, then download speed, upload speed, and name.
 - `peer100`: orders by peers at 100% descending, then connected peers descending, progress descending, and name ascending.
 
 ## UI And Design Rules
diff --git a/web/app.js b/web/app.js
index b4dfdf0..1aebaff 100644
--- a/web/app.js
+++ b/web/app.js
@@ -2,10 +2,11 @@
 
 /* ============================================================
    Transmission Manager - frontend
-   Vanilla SPA. Auto-refreshes every 3s with in-place updates.
+   Vanilla SPA. Auto-refreshes on a selectable interval with in-place updates.
    ============================================================ */
 
-const REFRESH_MS = 3000;
+const DEFAULT_REFRESH_MS = 3000;
+const REFRESH_INTERVALS = new Set([1000, 3000, 5000, 10000]);
 const TRANSMISSION_STATUSES = {
   0: "stopped",
   1: "check-wait",
@@ -21,6 +22,7 @@ const state = {
   stats: {},
   filter: "",
   sortKey: "status",
+  refreshMs: DEFAULT_REFRESH_MS,
   lastError: null,
 };
 
@@ -28,6 +30,7 @@ const torrentCards = new Map();
 const actionStates = new Map();
 let syncInFlight = false;
 let syncQueued = false;
+let refreshTimer = null;
 
 const $ = (sel) => document.querySelector(sel);
 
@@ -91,8 +94,34 @@ function setSyncing(on) {
   const el = $("#refresh-indicator");
   if (!el) return;
   el.classList.toggle("syncing", on);
-  const t = el.querySelector(".refresh-text");
-  if (t) t.textContent = on ? "syncing" : "live";
+  updateRefreshMetadata(on);
+}
+
+function refreshLabel() {
+  return `${state.refreshMs / 1000}s`;
+}
+
+function updateRefreshMetadata(syncing = false) {
+  const label = refreshLabel();
+  const indicator = $("#refresh-indicator");
+  if (indicator) {
+    indicator.title = `Auto-refreshes every ${label}`;
+    indicator.setAttribute(
+      "aria-label",
+      syncing ? `Syncing; auto-refresh every ${label}` : `Auto-refresh active every ${label}`,
+    );
+  }
+
+  const hint = $("#error-hint");
+  if (hint) hint.textContent = `Retrying in ${label}...`;
+}
+
+function setRefreshInterval(ms) {
+  state.refreshMs = REFRESH_INTERVALS.has(ms) ? ms : DEFAULT_REFRESH_MS;
+  updateRefreshMetadata(syncInFlight);
+
+  if (refreshTimer) clearInterval(refreshTimer);
+  refreshTimer = setInterval(sync, state.refreshMs);
 }
 
 async function runTorrentAction(id, action) {
@@ -217,6 +246,10 @@ function compareName(a, b) {
   return (a.name || "").localeCompare(b.name || "");
 }
 
+function activitySpeed(t) {
+  return (t.rateDownload || 0) + (t.rateUpload || 0);
+}
+
 function sortTorrents(list) {
   const key = state.sortKey;
   const sorted = list.slice();
@@ -230,6 +263,11 @@ function sortTorrents(list) {
         return (b.uploadRatio || 0) - (a.uploadRatio || 0) || compareName(a, b);
       case "size":
         return (b.totalSize || 0) - (a.totalSize || 0) || compareName(a, b);
+      case "speed":
+        return (activitySpeed(b) - activitySpeed(a))
+          || ((b.rateDownload || 0) - (a.rateDownload || 0))
+          || ((b.rateUpload || 0) - (a.rateUpload || 0))
+          || compareName(a, b);
       case "peer100": {
         const pa = peerStatus(a);
         const pb = peerStatus(b);
@@ -513,6 +551,19 @@ function wireEvents() {
     });
   });
 
+  const refreshSelect = $("#refresh-interval");
+  if (refreshSelect) {
+    refreshSelect.value = String(state.refreshMs);
+    refreshSelect.addEventListener("change", (e) => {
+      const next = Number(e.target.value);
+      if (!REFRESH_INTERVALS.has(next)) {
+        e.target.value = String(state.refreshMs);
+        return;
+      }
+      setRefreshInterval(next);
+    });
+  }
+
   $("#torrents").addEventListener("click", (e) => {
     const button = e.target.closest("[data-action-button]");
     if (!button || button.disabled) return;
@@ -535,8 +586,8 @@ function wireEvents() {
 /* ---------- Init ---------- */
 function boot() {
   wireEvents();
+  setRefreshInterval(state.refreshMs);
   sync();
-  setInterval(sync, REFRESH_MS);
 }
 
 document.addEventListener("DOMContentLoaded", boot);
diff --git a/web/index.html b/web/index.html
index 636adfe..fef178c 100644
--- a/web/index.html
+++ b/web/index.html
@@ -53,11 +53,22 @@
         <button class="sort-btn active" data-sort="status">Status</button>
         <button class="sort-btn" data-sort="ratio">Ratio</button>
         <button class="sort-btn" data-sort="size">Size</button>
+        <button class="sort-btn" data-sort="speed">Speed</button>
         <button class="sort-btn" data-sort="peer100">100% Peers</button>
       </div>
-      <div class="refresh-indicator" id="refresh-indicator" title="Auto-refreshes every 3s">
-        <span class="dot"></span>
-        <span class="refresh-text">live</span>
+      <div class="toolbar-actions">
+        <label class="interval-control" for="refresh-interval">
+          <span class="sr-only">Refresh interval</span>
+          <select id="refresh-interval" class="refresh-select" aria-label="Refresh interval">
+            <option value="1000">1s</option>
+            <option value="3000" selected>3s</option>
+            <option value="5000">5s</option>
+            <option value="10000">10s</option>
+          </select>
+        </label>
+        <div class="refresh-indicator" id="refresh-indicator" title="Auto-refreshes every 3s" role="status" aria-label="Auto-refresh active">
+          <span class="dot" aria-hidden="true"></span>
+        </div>
       </div>
     </div>
 
@@ -76,7 +87,7 @@
     <div id="error-state" class="error-state hidden">
       <p class="error-title">Connection error</p>
       <p class="error-sub" id="error-msg">Could not reach the Transmission daemon.</p>
-      <p class="error-hint">Retrying in 3s…</p>
+      <p class="error-hint" id="error-hint">Retrying in 3s…</p>
     </div>
   </main>
 
diff --git a/web/styles.css b/web/styles.css
index d9a004b..f503f31 100644
--- a/web/styles.css
+++ b/web/styles.css
@@ -69,6 +69,17 @@ body {
 h1 { margin: 0; font-weight: 700; letter-spacing: -0.02em; }
 button { font-family: inherit; }
 [hidden], .hidden { display: none !important; }
+.sr-only {
+  position: absolute;
+  width: 1px;
+  height: 1px;
+  padding: 0;
+  margin: -1px;
+  overflow: hidden;
+  clip: rect(0, 0, 0, 0);
+  white-space: nowrap;
+  border: 0;
+}
 
 /* ---------- Header ---------- */
 .app-header {
@@ -181,31 +192,59 @@ button { font-family: inherit; }
 .sort-btn:hover { color: var(--text-0); }
 .sort-btn.active { color: var(--bg-0); background: var(--accent); }
 
+.toolbar-actions {
+  display: inline-flex;
+  align-items: center;
+  gap: 10px;
+  margin-left: auto;
+}
+.interval-control { display: inline-flex; align-items: center; }
+.refresh-select {
+  color-scheme: dark;
+  background: var(--bg-2);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-sm);
+  color: var(--text-1);
+  cursor: pointer;
+  font-size: 12px;
+  font-weight: 700;
+  outline: none;
+  padding: 7px 9px;
+  transition: border-color .2s, box-shadow .2s, background .2s, color .2s;
+}
+.refresh-select:hover {
+  border-color: var(--border-strong);
+  color: var(--text-0);
+}
+.refresh-select:focus {
+  border-color: var(--border-hover);
+  box-shadow: 0 0 0 3px var(--accent-soft);
+  background: var(--bg-3);
+}
 .refresh-indicator {
-  display: inline-flex; align-items: center; gap: 7px;
+  display: inline-flex; align-items: center; justify-content: center;
+  width: 22px; height: 22px;
   color: var(--text-3);
   font-size: 11px;
   text-transform: uppercase;
   letter-spacing: 0.1em;
   font-weight: 600;
-  margin-left: auto;
 }
 .refresh-indicator .dot {
-  width: 7px; height: 7px; border-radius: 50%;
+  width: 8px; height: 8px; border-radius: 50%;
   background: var(--ok);
   box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.6);
-  animation: pulse 2s infinite;
+  animation: heartbeat 1.6s ease-in-out infinite;
 }
-@keyframes pulse {
-  0% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.45); }
-  70% { box-shadow: 0 0 0 7px rgba(52, 211, 153, 0); }
-  100% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); }
+@keyframes heartbeat {
+  0%, 28%, 70%, 100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.28); opacity: 0.82; }
+  14% { transform: scale(1.35); box-shadow: 0 0 0 6px rgba(52, 211, 153, 0); opacity: 1; }
+  42% { transform: scale(1.18); box-shadow: 0 0 0 4px rgba(52, 211, 153, 0); opacity: 0.95; }
 }
-.refresh-indicator.syncing .dot { background: var(--accent); animation: pulse-fast .7s infinite; }
-@keyframes pulse-fast {
-  0% { box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.55); }
-  70% { box-shadow: 0 0 0 5px rgba(0, 212, 255, 0); }
-  100% { box-shadow: 0 0 0 0 rgba(0, 212, 255, 0); }
+.refresh-indicator.syncing .dot { background: var(--accent); animation: heartbeat-sync .7s ease-in-out infinite; }
+@keyframes heartbeat-sync {
+  0%, 100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.4); opacity: 0.82; }
+  45% { transform: scale(1.35); box-shadow: 0 0 0 5px rgba(0, 212, 255, 0); opacity: 1; }
 }
 
 /* ---------- Torrent list / cards ---------- */
@@ -272,6 +311,8 @@ button { font-family: inherit; }
   gap: 10px;
 }
 .action-btn {
+  position: relative;
+  margin-left: 6px;
   min-width: 78px;
   border: 1px solid var(--border-strong);
   border-radius: 999px;
@@ -285,6 +326,17 @@ button { font-family: inherit; }
   text-transform: uppercase;
   transition: background .15s, border-color .15s, color .15s, transform .15s, opacity .15s;
 }
+.action-btn::before {
+  content: "";
+  position: absolute;
+  left: -11px;
+  top: 50%;
+  width: 1px;
+  height: 24px;
+  background: var(--border-strong);
+  transform: translateY(-50%);
+  pointer-events: none;
+}
 .action-btn:hover:not(:disabled) {
   border-color: var(--border-hover);
   color: var(--text-0);
@@ -422,7 +474,7 @@ button { font-family: inherit; }
   .stat-pill { padding: 5px 10px; font-size: 12px; }
   .container { padding: 16px 14px 36px; }
   .toolbar { gap: 8px; }
-  .refresh-indicator { margin-left: 0; width: 100%; justify-content: flex-end; }
+  .toolbar-actions { margin-left: 0; width: 100%; justify-content: flex-end; }
   .sort-group { width: 100%; overflow-x: auto; }
   .card { padding: 14px; }
   .card-top { align-items: flex-start; }