Features & details [DEEP BASS SOUND QUALITY] These wireless earbuds have built-in 2* Hi-Fi stereo horn produces crystal clear sound quality with deep bass. [20-HOUR PLAYTIME & FAST CHARGE] A single charge gives you a 3-5 hours of listening, while the charging case extends that to 20 hours. Each earbuds has built in 60mAh lithium polymer battery. The charging case equipped w/ 600mAh lithium battery, which support 3-4 times fully charge for the wireless earbuds. [ONE-STEP PAIRING] The latest push and go technology streamlines the setup process so when you take the wireless earbuds out from the charging case, they'll automatically power on and connect to the last paired device. Put back to the case, they will automatically power off. [TRUE WIRELESS] Bluetooth V5.0 technology provides faster pairing, stable connection and 33ft signal transmission(no-obstacle condition). Set yourself free from cable mess and enjoy music freely. [COMFY & CONVENIENT DESIGN] Super Lightweight(ONLY 0.15 oz). The ergonomic design for various ear size to ensure comfortable wearing, never fall out. One-button press control design to answer/end calls, play/pause music, skid forwards/backwards, pretty easy to use.