The USR-BLE102a with Wireless Modules RoHS is an ultra-small Bluetooth 4.2-certified module for low power IoT projects. It has a very low power consumption, a size of just 10.8 x 10.6 x 1.6mm, and a range of up to 10 meters. This module supports multiple Bluetooth Low Energy usage models, including BLE Central, BLE Peripheral, BLE Broadcaster, BLE Observer and GATT Server. It also comes with a pre-loaded UART protocol for easier development, supports transparent serial data transmission, and can be configured and controlled through AT commands. This product is manufactured by USR in US and it is compliant with RoHS directive.