# Xiaomi MHO-C401/MMC-C401 ATC or PVVX firmware
| Model Id | MHO/MMC-C401_ATC/PVVX (opens new window) |
|---|---|
| Brand | Xiaomi |
| Model | Compact Temperature sensor |
| Short Description | Temperature and humidity sensor compact and cost effective with ATC or PVVX firmware |
| Communication | BLE broadcast |
| Frequency | 2.4Ghz |
| Power Source | CR2032 |
| Exchanged Data | temperature, humidity, battery, volt |
| Encrypted | No |
| Image |  |