Model Number: WY-074-04 Brand Name: WANYI Key Specifications/Special Features: 1. Supports speakerphone, built-in microphone, to bring clear calls for you2.Pure music, perfect to enjoy3.Lasting power, long battery life4.Simple and easy to operate key design Model No.WY-074 Battery capacity 500mAh Work time 5 hours Output power 3W Working range 10m Frequency response 280HZ-16KHZ Signal-to-noise ≥95dB Distortion ≤0.5%