2pcs RHA-BT103M Small-Sized BLE 5.2 Bluetooth Module, Ultra-Low Power,

Compact BLE 5.2 Module: Small size (16mm x 10mm x 2mm) with high-speed serial port transparent transmission and compatible with Android/iOS system. Ultra-Low Power Consumption: Optimized for low power performance, offering deep sleep mode at just 2.2uA for long-lasting battery life. Long-Range Wireless Communication: Stable transmission with a working distance of over 100 meters, ideal for industrial and smart home devices. Multi-Connection Support: Integrated master-slave mode supporting Integrated Master-slave Single Connection, 1 master and 2 slaves, with multi-connection capability (up to 6 master devices). User-Friendly Configuration: Supports simple AT command configuration, enabling users to easily modify settings like baud rate, power levels, and more.