1.[BLUETOOTH 5.0 TECHNOLOGY] Wireless Bluetooth Earbuds adopt the most advanced Bluetooth 5.0 technology, Provides in-call stereo sound and fast, stable transmission. You just need to open the charging case and connect to on your device. They will connect to the last connected device automatically after first used.^ 2.[ CONTINUOUS CYCLIC PLAYTIME] 2 hours of charging gives you 3-4 hour of continuously playing, the mini portable charging case can recharge 4 additional times. Total play time up to 20-30h. The size of charging case just likes a car key and very light. Built for your convenience to carry the earbuds around and charge them anywhere.^ 3. [HIGH FIDELITY SOUND] The Wireless Earbuds vibrating diaphragm and HD rendering technology produce incredible sound quality with crystal crisp treble. Enjoy your music everywhere even in a loud environment.^ 4.[ONE-CLICK MANIPULATION AND COMFORTABLE WEARING] After connected, you can control your music and accept or reject calls with just one button, really wireless. With ergonomic design, own incredible comfort and seamless sound that sits effortlessly in your ears. Let you immerse yourself in the music.