Quantity 1 Color White + blue Bluetooth Version V4.0 Operating Range 20 meter Compatibility No Microphone No Radio N/A Supports Music Format N/A Power Supply Built-in battery Compatible With No Other Features Powered by 1 x CR2032 battery (included); Static standby power consumption: 0.4uA; Receive sensitivity: -100dBm; 0~10m distance adjustable; With anti-lost goods finder and alarm reminder with vibration functions auto power save; Adopt AES128 coding technique alarm start when distance between cell phones and this item out of guarding range; Can find goods by cell phone or find cell phone by this item; TI CC2540/CC2541 single chip. Packing List 1 x Anti-lost alarm device 1 x English / Chinese user manual 1 x Keychain