Yison B4 Pure Sound Wireless Headphone Quick Details: Brand Name: YISON Model Number: B4 Style: Headphone Communication: Wireless Use: Mobile Phone, COMPUTER, Gaming, Sports, Travel Function: Microphone Wireless Version: V5.0 Charging Port: Micro-USB Battery Capacity: 400mAh Transmission Distance: 10m Standby Time: 280H Call Time: 8H Charging Voltage: DC 5V Feature: Powerful Stereo Bass Support: Aux Input