Features: brand new and high quality Bluetooth-compatible V5.1, support most bluetooth-compatible devices, lower power consumption. The 360mAh charging box can fully charge 2 earphones about 40 times, providing more than 150 hours of music for time(with the charging box use). Adopt waterproof technology, no longer have to worry about water and sweat. Dual driver unit, enjoy powerful and super music sound. The popular for touch control function supports switching songs, phone calls, and calling voice assistants. Specifications: Material:ABS Color:Black,Blue,Green,Pink,White(Optional) Charging Box Size:85x48x32mm/3.35x1.89x1.26in Earphone Size:38.5x23.5x23.5mm/1.62x0.93x0.93in Bluetooth-compatible Version: 5.1 Operating Range: About 33feet Barrier-free Transmission Distance (10meters Barrier-free Transmission Distance ) Earphone Capacity:40mAh Storage Box Capacity:360mAh Calling Time:About 200hours(with the storage box use) Charging Voltage: 5V Package Includes: 1 Pair Headsets 1x Charging Box 1x Charging Cable 1x User Manual note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.