diff --git a/README.md b/README.md
index cea9b3c..dc1a544 100644
--- a/README.md
+++ b/README.md
@@ -242,6 +242,14 @@ voxcpm --help
 python app.py --port 8808  # then open in browser: http://localhost:8808
 ```
 
+Use `--device` to choose the runtime device:
+
+```bash
+python app.py --device auto
+```
+
+Supported values are `auto`, `cpu`, `mps`, `cuda`, and `cuda:N`. On Apple Silicon Macs, `auto` uses MPS when available.
+
 ### 🚢 Production Deployment (Nano-vLLM)
 
 For high-throughput serving, use [**Nano-vLLM-VoxCPM**](https://github.com/a710128/nanovllm-voxcpm) — a dedicated inference engine built on Nano-vLLM with concurrent request support and an async API.
diff --git a/README_zh.md b/README_zh.md
index 497554d..ec781e4 100644
--- a/README_zh.md
+++ b/README_zh.md
@@ -241,6 +241,14 @@ voxcpm --help
 python app.py --port 8808  # 然后在浏览器打开 http://localhost:8808
 ```
 
+使用 `--device` 选择运行设备：
+
+```bash
+python app.py --device auto
+```
+
+支持的取值包括 `auto`、`cpu`、`mps`、`cuda` 和 `cuda:N`。在 Apple Silicon Mac 上，`auto` 会在可用时使用 MPS。
+
 ### 🚢 生产部署（Nano-vLLM）
 
 如需高吞吐量部署，使用 [**Nano-vLLM-VoxCPM**](https://github.com/a710128/nanovllm-voxcpm) — 基于 Nano-vLLM 构建的专用推理引擎，支持并发请求和异步 API。