More Details:<br><br><br><br><br><br>Specification:Brand Name: ZEALOTModel Number: H2Bluetooth Version: V4.0Bluetooth Chip: CSR 4.0Support Protocol: HFP， HSP， A2DP， AVRCP， APTX.Noise Reduction: CVC 6.0Music Time: About 6 hours (proper volume)Charging Time: 1-2 hoursSpeaker: 16&amp;Omega;Frequency Response: 20Hz-20kHzSNR: 70-90dBOutput Voltage: DC 5VTransmission Distance: 10mOutput Power: 10mWWorking Voltage: 3.7VDistortion: &amp;le;1%Net Weight: 17gSize: 38*16*28mmOptional Color: Black， White.Funtion: Answer\/hang up\/reject\/transfer\/waiting\/redial\/mute\/mute\/pause music\/switching song.<br>Package Included:1 X Zealot Bluetooth Headphone1 X CHarging Cable1 X Ear Hook1 X Earmuffs1 X Manual