Bluetooth products allow you to communicate.without the cord.
Models：PRYME BTD-3H3
Built-in high-energy Battery, working time 20 hours
For Hytera TC-518/700/700EX/610/620
BT Version：2.1
BT follows specifications：BT Version 1.1 or higher
Number of BT connections：Max 2
Range (Typical):10 meters (30 feet)
Status Display：LED
Operating voltage：5-9V DC
Standby Current Draw：13.5mA（MAX 20mA）
Power mode：Built-in battery
Operating Temperature Range:-20° C to + 75° C
Storage Temperature Range ：-40° C to 150° C
Specifications：65mm(H) x 30mm(W) x 17mm (D)
