The wireless version V5:1 has fostered innovation that not just makes your eyes pause but also makes you crave more with 6 hours of music duration, single-time charging for 2-3 hours, and RGB lights that make you buzz all day and night. Its compact size makes it an ideal travel companion. Bass it louder with 3 amazing hues black, grey, and green. Wireless Version : V5.1 Music Time : 6 Hours Battery : 1200 mAh Driver Unit : 52mm Impedance : 3Ω Battery Charging Voltage : DC5V Battery Charging Time : 2-3 Hours Power Output : 5WX1 Colors : Black, Grey, Light Green