GaiRen Referee Headset, Communication System with Headset Earphone for Volleyball Official Football Soccer Handball (4 Pack)

【Upgraded 4 Person Group Intercom】V4 Plus Bluetooth Intercom allows you to connect 4 referees meanwhile for conference intercom, total range up to 1500 meters. 【Clear and Stable Sound】With improved CVC noise reduction technology and Bluetooth 5.1version, even in a noisy environment of 120km/h or in noisy stadium, the high-fidelity speakers also can make the sound you hear clear and stable. 【Wide Applications】V4 Plus is an excellent partner for most competition referees like football referees, volleyball official, basketball referees, golf referees, etc. In addition to referees, V4 Plus is suitable for daily training, construction sites, venue scheduling and other outdoor activities. 【Low Power Consumption】After circuit optimization, the power consumption is reduced by 20%. Just 2 hours of charging, talking time is up to 18 Hours and music playing time is up to 24 Hours. 【Waterproof】With IP65 waterproof, the headset can handle almost all weather conditions. The Bluetooth headset can withstand 14℉ to 122℉ and can be used in most countries and regions.