Feature:1. Function: This bluetooth module can realize the wireless monitoring function of solar charge controller, support cell phone APP plug and play, easy to set up.2. Great Performance: Adopting high performance and low power consumption Bluetooth special chip, this module provides stable, fast and uninterrupted long distance connection.3. Anti Interference: Adopting Bluetooth 4.0 and BLE technology, featuring fast communicating and strong anti interference ability, safe and secure to use.4. Long Communicating Distance: No external power supply is needed, the power supply is directly powered by the communicating port, and the distance is up to 15 meters, strong and stable signal coverage.5. Compact and Portable: Super tiny and lightweight in size, this Bluetooth module won't take up too much space for installation, allowing for a flexible usage.Specification:Item Type: Bluetooth ModuleMaterial: ABSWeight: Approx. 101g or 3.6ozApplication: Suitable for MC series MPPT 20A 30A 40A 50A solar charge controller.Package List:1 x Bluetooth Module1 x Specification