Features: -Bonebuds TWS Bone Conduction Earbuds, sound transmit via cheekbone to your inner ear.  -Bonebuds was designed with closed system and waterproof skin. Rain or sweat does no harm to it.  -On a single charge, the earbuds can support up to 8 hours playback time, with charging case, total up to 24 hours.  -The four green LED indicators on the base display the level of remaining power in the earbuds as well as in the charging compartment, and everything is under intelligent control.  -Ergonomic design, and not afraid of falling off, specially designed for sport lovers.  -Be able to hear the ambient noise and surrouding talks while you are listening to music.  -Very soft and comfortable silicone gel, skin friendly.     Specifications: Bluetooth: V5.0.  Chipset: Actions chipset ATS3015.  Support: A2DP/HFP/HSP/AVRCP.  Charge time: about 2H.  Playtime: about 8H at80% volume 50% volume: playback time 8.5H.  Handsfree Calling: about 4H.  Standby: about 62H.  Earphone Battery: 120mAh each.  Charging Case Battery: 500mAh.  LED Power Display: 4pcs LED indicators.  Waterproof: IPX5.  Distance: about 10M.  Driver: φ10.8mm/Bonduction Driver.     Package Contents: 2 * Bluetooth Earphones.  1 * Charging Case.  1 * USB Cable.  1 * User Manual.  3 * Earphone Caps (S,M,L Size)