Product Details   Product Parameters: Outdoor Sport Bluetooth Headphones in Ear Hifi Bluetooth EarbudsBluetooth Version4.1Bluetooth protocolHSP,HFP,A2DP and AVRCPSupportSBC , MPS decoder and APT-XTalking / Playing time10 hours /10 hoursStandby time330 hoursCharging time2.5 hoursTransmission distanceAbove 10 metersWeight12gImpedance16 ohmFrequency response20-20kHzLoudspeaker size8mmSensitivity100 /-3dbCharging input5V/200mACertificationsBQB,CE,RoHS, REACH, FCCOEM/ODMYesPatentHave patentKey Specifications/Special Features:Outdoor Sport Bluetooth Headphones in Ear Hifi Bluetooth EarbudsModel: STN-840 Specification of BluetoothBluetooth version: v4.1 EDROperation distance: 10mRechargeable lithium battery: 160mAh  Specification of headphoneType: stereo headphone with micSpeaker: 8mmSensitivity: 90dBFrequency response: 20Hz-20KHzColors: black, red, or any color as customers' requirementOutdoor Sport Bluetooth Headphones in Ear Hifi Bluetooth Earbuds PictureOutdoor Sport Bluetooth Headphones in Ear Hifi Bluetooth EarbudsRecommendations: Lightweight Noise Cancelling Bluetooth Earphones Bluetooth Earsets                                  Double Ear Wireless Bluetooth Earphones Stereo Earsets                                   In-ear Waterproof Bluetooth Earphones Ergonomic Bluetooth Earpieces                                  Mini Stereo Bluetooth Earphones Ergonomic Bluetooth Earsets