The Xiaomi LYWS03MMC is a compact wireless thermometer and hygrometer made from ABS and PMMA materials. It operates with a CR2032 battery and features a temperature range of 0°C to 60°C and a humidity range of 0% to 99% RH. It offers temperature display resolution of 0.1°C and humidity resolution of 1% RH. The device connects via Bluetooth 4.2 BLE and operates on a voltage range of 2.5V to 3V. Its dimensions are 43×43×12.5mm.