This small size Bluetooth 4.0 TTL transceiver module allows your target device communicate with.
your iPhone/iPAD, IOS 6 or Android 4.3 above devices. 
It's easy to use and completely encapsulated. 
You can set it as slave or master.
You can use AT command set the baudrate.

Specifications:

Ultra-low standby power consumption 90uA~400uA
Coverage up to 60 meters
Built in PCB antenna
Power input: 3.6V-6V DC(Can not higher than 6V)
Size: 43mm x 15mm
Color: Blue

Package includes:

1PCS HM-10 BLE Bluetooth 4.0 CC2540 CC2541 Serial Wireless Module Arduino Android IOS CA