diff --git a/README.md b/README.md
index 2ba9100..81eaa65 100644
--- a/README.md
+++ b/README.md
@@ -59,17 +59,15 @@ cmake --build build
 
 ## Misc
 
-<!--
 ### Managing only specific GPUs
 
-You can use `CUDA_VISIBLE_DEVICES` to manage only specific GPUs.
+You can use `-i`/`--ids` option to manage only specific GPUs.
 
-Suppose you have 8 GPUs and you want to manage only the first 4:
+Suppose you have 8 GPUs and you want to manage only the first 4 (as in `nvidia-smi`):
 
 ```sh
-CUDA_VISIABLE_DEVICES=0,1,2,3 ./nvidia-pstated
+./nvidia-pstated -i 0,1,2,3
 ```
--->
 
 ### systemd service
 
@@ -89,7 +87,3 @@ RestartSec=1s
 [Install]
 WantedBy=multi-user.target
 ```
-
-<!--
-You can add `Environment=CUDA_VISIBLE_DEVICES=...` in `[Service]` section to manage only specific GPUs.
--->