ER1719B Brand & Model: XN-1400 Built-in microphone and speaker Wireless remote control range up to 10 meters Supports connection with two phones at the same time Call Time: 8 hours Adjustable volume Supports voice dialing Bluetooth Version: V3.0 Frequency: 2.4GHz Voltage: 12-24V Battery Capacity: 600mAh Standby Time: 30 days Package Details Weight: 118.77 g Size: 21.2*8.00*3.00 cm Package Includes * XN-1400 Voice Dial Bluetooth Car Hands-free Phone Speaker