XFox&reg; RHF 617-1N 3.5mm Surveillance Plug Receiver/listen Only Audio Earpiece with Clear Acoustic Tube Earbud For Motorola Kenwood Baofeng Two-Way Radios,Transceivers and Radio Speaker Mics Jacks XFox 3.5mm Surveillance Plug Receiver/listen Only Audio Earpiece Output level: 72dB, rated input power: 0.1W, Maximun input power: 0.2W, Output impedance: 32 ohms All original XFox equipment manufacturer (OEM) parts Work for high noise level environments and discrete listening. Compatible with standard, Incom, Yaesu, Alinco, Motorola and Adi transceivers and also fits radio speaker mics, MP3 players and similar devices with 3.5mm connector