Check the listing for details. Full Duplex Bluetooth Football Soccer Referee Intercom Headset Kit. Color: Black, Condition: New. Listed at 109.99 USD. this interphone is specially designed according to customers requirement, we used a large capacity battery to realize a long standby up to 480hrs! CSR chip from UK, makes the soud quality better, you can hear the voice in a noisy condition as well. No need to press the PPT button to start a talk, instead, you can use it handsfee by putting it into your pocket or armband case. It\'s great to be applied in belowed situation:engineering work, aerial, motorcycle riding, skiing etc. Support 4 riders to talk at the same time! After the bluetooth pairing, other wireless signal cannot connect to or affect the intercom! National 5 waterpoof, protect the intercom from water and rain. Equip the interom on your helmet, then you can ride the motor and communicate with your rider handsfree. Support FM radio, not boring on the road any more. Package Included: 1x GoRef intercom 1x Headset 1x Armband Case 1x USB charging cable 1x English user manual