This small size Bluetooth 4.0 TTL transceiver module allows your target device communicate with your Phone, for IOS 6 or Android 4.3 above devices. It's easy to use, You can set it as slave or master. You can use AT set the baudrate. Specifications: Ultra-low standby power consumption 90uA~400uA Coverage up to 60 meters Built in PCB antenna. Material:plastic colour:Blue+black Package Contents: 1 * Module Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.