3Pcs HC Type 05 Wireless Bluetooth RF Transceiver Master Slave Integrated Module 6 Pin Serial Port Communication BT Module.

This 05 Bluetooth module has a range of up to 10 meters through Bluetooth class 2 Wireless Bluetooth module: Input voltage: 3.6V-6V, prohibition more than 7V); Working voltage: 3,3V Easy to use: It is possible to control master or slave mode via AT commands. The device can be connected via certain AT commands. Wireless module: Bluetooth module, which can help add the Bluetooth function to your project easily, then you can use your Android phone to get some gadgets like: switch, LED, etc. (NOTE: module does not work with iOS)