♪TRUE WIRELESS STEREO EARPHONES: Adopting V4.1 Bluetooth Version+EDR technology, provide a quick and stable connection with your Bluetooth, enabled devices within 10m/33 feet. No mess of cables, no more wires stuck to your neck when you sweat, no more noise caused by the wires when you sport ♪HIGH-FIDELITY SOUND & BUILT-IN MIC: Adopted with CVC 6.0 Noise & Echo Cancellation technology. Our wireless earphones provide you with high fidelity stereo music, you can enjoy crisp percussion, clear vocals and bass. Noise cancellation technology enables the microphone to transmit crystal clear voice for hassle-free calls, ideal for car calling and friends chatting or working use ♪COMFORTABLE WEARING: Collect ear outline data of more than 2000 people, mini design suitable for the human ear and three sets of spare earplugs of different sizes to let you choose suitable one and give your ear a more comfortable wearing experience ♪EASY OPERATE & LONG PLAYING TIME: With one touch operation, Call / Refute, Play / Pause, Power On / Off, the last redial, there is no noise of press-button. Charging box with built-in 450 mAh battery, can provide 3-4 times quick full charging for earphones, the working time of each charge is up to 2-3 hours ♪WATERPROOF & FIRMLY: IPX5 water protection, they are resistant to sweat, rain, allows you to wear the earphones in a wet environment and also work perfectly. Two sets of ear hooks of different sizes ensure the earphones stay firmly in your ears, ideal earphones for outdoor sport