Two/Three-wire acoustic tube surveillance earphone Excellent Communication Quality in Reception and Transmittance Designed for use in light duty applications such as Security and Hospitality Applicable to all type of sport - skiing, snowboarding, snowmobiling, skateboarding, motorcycling, fishing, hunting, camping, cycling, canoeing, kayaking, paintball and airsoft game. Optional remote PTT Please contact us for more details. Origin China Packaging neutral packing