Feature:  Long Battery Life.  Small size has long endurance. Super long endurance. Support multiple charging of earphone without false mar. 12 hours single use. 48 hours total endurance.  Touch operation.  Touch control is faster and more efficient.  Double label HD call.  Low frequency elongation excellent analytical power. Bring you a powerful and natural music experience.  Play without delay.  The link is stable and continuous line, playing the game to listen to the voice position hd video ultra low delay audio and picture. synchronization.  Bluetooth 5.1 fast connection technology.  Bluetooth 5.1 high T input provides high decode HIFI sound quality and uninterrupted call experience.  Wear comfortable without pain.  Low frequency extensibility excellent analytical power, bring you strong and natural music experience.     Specification: Product weight: 4-5g (one ear).  Working time: about 2-4 hours.  Wait time :120 hours.  Charging time :1 hour.  Battery capacity of single earphone :30mah.  Betty: 200 mah.  Wireless distance :10 meters.  Product weight: earphone bare 42G.  Packing weight: 120g.  Charging bay size: 55*20*44mm.  Packing standard: 100 PCS/CTN.  Size: 52.5 * 35.6 * 21.5 CM.  FCL weight: 12.4kg.  Compatible with mobile phones: The headset is compatible with Android, ios, etc.     Package Included: 1* J88 TWS Earphones with Charging Box.  1*Tpye-C charging cable.  1*Instruction manual