Details:Wireless Bluetooth 4.0 Sports In-ear Headphones Earphone Earbud Headphone Headset with Mic Handsfree Calling for iPhone 6 Plus + 5S 5C 5 Samsung Galaxy Note 4 3 S5 S4 Sony Xperia Nokia Blackberry Google Nexus Mobile Phone LaptopControl music and calls from the headphone wirelesslyWith mic allows you answer the call anytime and anywhere (answer / end / reject /redial)Playing music: Volume control; Previous / Next song controlSuitable for Bluetooth enabled devicesInstruction:HV-803 Pairing:press the multifunction button for 5 seconds into pairing modeSupport connecting two phones simultaneously:after the first phone connected， press multifunction button for 3 seconds into shut off status， then press 5 seconds to pairing mode to connect with HV-803， make the first mobile phone choose HV-805 and connect againSpecifications:Bluetooth Version: 4.0 + EDRPower amplifier output:RMS 2x18MW (THD=10%)Power amplifier SNR: ≥90dBInput: 3.7v rechargeable lithium batteryContinuously playing time: 4-5 hoursCalling time: 6-8 hoursCharging time: 1-2 hoursCharging input: DC5V 500MAHSpeaker specification: 2x16Ω 20MW Φ10mmFrequency:20Hz-20KHzSensitivity: ≥100db±2dbSNR:≥80DbTransmit/Receive frequency: 2.4 - 2.48GHzOperation Distance: 10m (no barrier)Color:blackPackage:1 x headphone1 x USB Cable3 x pair of ear hooks3 x pair of ear cups1 x pair of ear cup(pre-installed)1 x user manual