US True Wireless Sport Earbuds Headset Bluetooth HIFI In Ear Stereo Headphones-BLACKCategory: Orange Stereo EarbudsFeatures:TURE WIRELESSTEREO: Portable Stereo Sport Headphones, Sports Headsets Lightweight Earbuds With Mic for iPhone Samsung HTC LG and other Bluetooth devicesSTATE OF THE ART EARPHONES DESIGN: Best workout Bluetooth headphones. Great for walking, Jogging, Hiking, Biking, Gym and some other activity.SUPERB SOUND QUALITY: High Quality Chip for Stereo Sound and Bass Sound .Clear High & Low Volume . It's Easy To Take and Make Calls ,Voice Dialing with Superior Microphone Quality. Ideal for Car Calling and Friends Chatting, or Working Use.CVC NOISE CANCELLATION TECHNOLOGY: It has excellent noise cancellation technology with the use of CVC depth noise reduction. Bilateral stereo APT-X lossless sound quality, it provides a shock enjoyment with entering the ear in a deep bass voice. The sound hole design reduces an echo back of sound waves, making the sound room more pure and the high, medium and bass more harmoniousLONG BATTERY LIFE: Built-in 300mAh battery box,it can charge the two true wireless earbuds 3 times without cable, Up to 9 hours music or talking time, you never have to worry about running out of battery on your wireless headphone.COMFORTABLE AND SECURE: Ergonomically designed with gel flex silicone earbuds to ensure your headphones stay comfortably firm in place to guarantee fatigue free ears and tangle free comfort.Specifications:- Compatible Brand: For Apple, Samsung, LG, HTC, Google, Sony, LG, HTC, Nokia, Motorola, Microsoft,Huawei, Xiaomi, Blackberry, Oneplus, Lenovo, Asus, Acer, OPPO, Meizu.- Compatible Device: Bluetooth-enabled mobile phones, tablets, computer, watch, MP4, speaker.- Bluetooth Standard: V4.2+EDR- Bluetooth Profiles: HSP1.2、HFP1.6 、A2DP1.3、AVRCP1.5- Audio enhancements: CVC noise reduction- Standby Time: Up to 150 Hours- Music/Talk Time:2.5-3 Hours(Earbuds)- Music/Talk Time: Up to 9 hours (with a 300mAh protable battery case)- Battery type: Rechargeble lithium-ion polymer battery- Battery capacity: 50 mAh (with a 300mAh protable battery case)Package:1×Bluetooth Headphone1×Mirco USB Cable 1×User's manual2×EarbudsHow to use it?Binaural Mode: （Both earbuds work together）Note：This mode would need you to turn off the Bluetooth on phone firstly 1. Pressing the two earbuds' main button for seconds at the same time till the Red&Blue light flash alternately; 2. Double-Click one the of earbuds (the other one keep still) to get paired with the other one, that would cost 3 seconds;3. Turn on the Bluetooth on phone, find out "A7" and connect it, then you would hear the sound for both. If you want to use one, please refer below. That would be more easier. Single Mode: 1. Pressing the earbud's main button for seconds untill the Red&Blue light flash alternately; 2. Find out "A7" on Bluetooth and connect it, then you would hear the sound in one earbud.Note:The wireless buletooth stereo earbuds utilize the latest TWS (True Wireless) Bluetooth technology,the audio frequency range is similar with WIFI signal.It is a normal phenomenon that in individual cases, slave earbud(right chennal) might be interference by wireless signals but it connected automatically after without sound for 1-2 seconds while master earbud(left chennal)runs fine.Please try reconnect the earbud if it has a sound or connection problem.- The distance between the headset and mobile phone can not be greater than 10M- The distance between the two earphones can not be greater than 50cm.- If in Calling, just the Main earphone has the voice.