Fits Android devices, iPhones, two-way radios (audio only), radio speaker mics, remote mics, MP3 players, and other audio accessories with 3.5mm earphone jack. Output level: 72dB. Rated input power: 0.1W. Maximum input power: 0.2W Reinforced earphone clip provides cable retention and eliminates strain on earphone. Perfect for high noise level environments and discreet listening 100% compatible with any 3MM jack. colour: Silver Material: PC size: 36 x 0.2 x 0.2 inch Package Contents: 1*Professional Security Headset Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.