Features: 1) Earset for handheld transceivers with voice-activated throat mic 2) High receiving capability 3) Popular and unique style, portable and comfortable 4) Noise-cancellation speaker which compact and easy to carry Specifications: 1) Speaker diameter: 15mm 2) Speaker impedance: 32Ω±15% 3) Sensitivity: 101±2dB 4) Max. input power: 50mW Inner packing: polybag or customized Outer packing: carton