diff --git a/DISCLAIMER.md b/DISCLAIMER.md
index 0a08f16..4c266ad 100644
--- a/DISCLAIMER.md
+++ b/DISCLAIMER.md
@@ -19,7 +19,15 @@ Linux bisa memakai perangkat yang secara resmi hanya didukung aplikasi Windows.
    HID. Penulis telah mengujinya pada perangkat miliknya sendiri, tetapi tidak ada
    jaminan apa pun — termasuk jaminan kelayakan untuk tujuan tertentu. Gunakan dengan
    risiko Anda sendiri.
-5. **Tanpa jaminan.** Perangkat lunak disediakan "sebagaimana adanya" di bawah
+5. **Batasan perangkat.** Perangkat lunak ini hanya mengirim data sensor. Panel
+   **tidak bisa dimatikan** dan **logo pada panel tidak bisa diganti** lewat USB —
+   keduanya urusan firmware vendor, bukan sesuatu yang bisa dilakukan proyek ini.
+   Nilai yang ditampilkan panel terbatas dua digit dan berlabel °C.
+6. **Diuji pada** panel GAMEMAX IceBurg 240 Digital (HID `5131:2007`) di CachyOS
+   (Arch), kernel 7.2.9, KDE Plasma Wayland, Python 3.14. Revisi firmware lain bisa
+   berbeda perilakunya; uji dulu dengan `--dry-run` (tidak menulis apa pun) sebelum
+   dipakai rutin.
+7. **Tanpa jaminan.** Perangkat lunak disediakan "sebagaimana adanya" di bawah
    lisensi MIT; lihat `LICENSE`.
 6. **Perkakas pihak ketiga** yang dipakai saat analisis (mis. REA, Ghidra, PySide6)
    tetap tunduk pada lisensinya masing-masing dan tidak didistribusikan ulang di sini.
@@ -34,6 +42,12 @@ only by a Windows application.
 - Independently reverse engineered for interoperability. No vendor code, binaries,
   or assets are redistributed; the application icon is original artwork.
 - Trademarks belong to their respective owners.
-- The software writes to a USB HID device. It was tested on the author's own hardware
-  only. Use at your own risk, provided "as is", without warranty of any kind (MIT).
+- The panel cannot be powered off and its logo cannot be changed over USB; those are
+  firmware features of the vendor. Displayed values are limited to two digits and are
+  labelled °C by the firmware.
+- The software writes to a USB HID device. Tested with a GAMEMAX IceBurg 240 Digital
+  panel (HID `5131:2007`) on CachyOS/Arch, kernel 7.2.9, KDE Wayland, Python 3.14.
+  Other firmware revisions may behave differently — inspect with `--dry-run` (writes
+  nothing) before relying on it. Use at your own risk, provided "as is", without
+  warranty of any kind (MIT).
 - Third-party analysis tools keep their own licenses.
diff --git a/README.md b/README.md
index 7a3c0d1..2ef33d6 100644
--- a/README.md
+++ b/README.md
@@ -7,10 +7,29 @@ Reverse engineered independently from the Windows vendor software
 (`PcInfoMonitorPro.exe` / "IceBurg Digital Software"); the protocol notes are in
 [`docs/reverse-engineering.md`](docs/reverse-engineering.md) (Indonesian).
 
-Author: **oxpoe** · License: **MIT** · Please read [DISCLAIMER.md](DISCLAIMER.md).
+Author: **oxpoe** · License: **MIT** · Independent project, **not affiliated with the
+vendor** — please read [DISCLAIMER.md](DISCLAIMER.md) before using it.
+
+> **Compatibility**
+> - **OS:** Linux only (Windows is handled by the vendor software). No kernel module,
+>   no patched driver — it talks to the standard `hidraw` interface.
+> - **Tested on:** CachyOS (Arch) · kernel 7.2.9 · KDE Plasma Wayland · Python 3.14,
+>   with the panel of a **GAMEMAX IceBurg 240 Digital BK** (HID `5131:2007`,
+>   vendor-defined usage page `0xFF00`, 64-byte reports).
+> - Other IceBurg Digital models/sizes very likely share the same protocol; if a panel
+>   revision differs, `gamemax_report.py --dry-run` lets you inspect the report without
+>   writing to the device.
+> - The panel keeps animating on its own; the firmware offers **no command to power the
+>   display off** and **no way to change the logo** — blank mode simply sends zeros.
 
 ![Tray app preview](assets/preview.png)
 
+### Screen modes
+
+| Normal — sensor values | Blank — zeros (indicator is clear) |
+|---|---|
+| ![normal](assets/preview.png) | ![blank mode](assets/preview-blank-mode.png) |
+
 ## Features
 
 - Sends CPU temp/load/clock/fan/power, GPU temp/load/clock/fan/power, RAM and disk
@@ -32,6 +51,9 @@ The GUI labels are in Indonesian.
 
 ## Requirements
 
+- A GAMEMAX IceBurg Digital panel connected over USB (VID `0x5131`, PID `0x2007`)
+- `hidraw` access for your user (see the udev rule in *Install*)
+
 - Linux with a working `hidraw` stack (tested on CachyOS / Arch, KDE Wayland)
 - Python 3.10+ for the sender (stdlib only)
 - For the tray app: PySide6 (`uv run --with pyside6 python src/gamemax_gui.py`)