This product is suitable for judges, cranes, aerial photographers, videographers and other places that require full duplex operation.

Features:
It can be used as cell phone device for hands-free bluetooth headset.
Support four referees at the same time full-duplex calls, up to 1000 meters speech range.
Bluetooth 3.0 professional chip, 850mAh battery, talk time up to 8 hours, standby time 240 hours.
The advanced DSP noise suppression technology helps clear music and ensures almost no interference to intercom.
Water resistant IP65, full weather protection.

Specifications:
Item type: Intercom;
Chip: CSR BC5;
Quantity: 1PC, 2PCS(optional);
Bluetooth version: 3.0;
Working voltage: 3.3V-4.2V;
The speaker power: 0.25W;
Operating temperature range: -10 ~+45 ;
Radio band: FM87.5~108MHz;
Stand-by time: Approx. 150H;
Charging time: Approx. 2.5H;
Package weight: 1PC: 187g / 6.59ounces;
2PCS: 309g / 10.8ounces;
Package size: 1PC: 165 100 50mm / 6.49 3.93 1.96inches;
2PCS: 225 100 50mm / 8.85 3.93 1.96inches;

Package list:
2 Intercom;
2 Headphone;
2 USB cable;
2 Arm bag;
1 User manual

• Weight (lbs.): 0.50 lb