[True Wireless Earbuds & Easy to Pair]- When you take out the BT bass earbuds together from the charging Box, they will automatically pair, then turn on your device BT to pair. No matter if you put your right or left earbud back in the charging case, the signal will not be disconnected, you can continue to enjoy the music. [Hi-Fi Stereo Sound Quality & Wireless Earbuds ]- APTX wireless stereo earbuds offer a truly natural, authentic sound and powerful bass. BT Wireless Earbuds maximum transmission distance of 20 meters and have an unmatched combination of comfort and stability. When you long press the power button for 2 seconds, the wireless sport earbuds will enter into the transparent mode, in which you can listen outside voices clearly. [100 Hours Playtime]-BT Earbud itself is with built-in 60mAh mini battery, can provide 7 hours play time. The charging Box is with 2600mAh large-capacity battery. If put earbuds into it when not use it, earbuds playtime can reach 100 hours, standby time can reach 30 days. [IP67 & Wireless Sport Earbuds]- IP67 protects the earbuds from sweat or water, as well as dust. We offer 5 pairs of different sizes of silicone eartips, you can choose the one that suits you. When you are running, the earbuds are fit and will not fall. [Ergonomic design & Widely Compatible]-Lots of ear shape data collection, thousands of real peoples tests, the radian adjustment precise to 0.05MM, the persistence in pursuit of perfectness. The ergonomic design makes you feel comfortable when you wear it for a long time. The BT earbuds for running are compatible with BT devices of the android ios window system. Transmission Profiles: HSP1.2/HFP1.8/A2DP1.3.2/AVRCP1.6.2/SPP1.2 Speaker Frequency: 20~20KHz BT version: 5.0 Battery Life: 8~10 Hours (varies by volume level and content) Battery Life With the Case: 7 days Full Charging: ~2 hours Charging times: Approx 15 times Battery Capacity(the case): 2600mAh (3.7V) Battery Capacity(earbuds): 60mAh BT Codec: AAC, SBC, aptX, aptX HD Working temperature range: -10 - +55 storage temperature range: -20 - +60 Charging Case: Type-C port USB Earbuds charging port: POGO PIN USB Waterproof: IPX7 Item Size: 23.1*17.0mm*21.9mm(1*Earbud); Item Weight: 121.9g (with case) Package Size: 105*105*55mm Package Weight: 238.6g