20 Hours Play time Swimming Waterproof Bluetooth Earphone Dual Wear Style Sport Wireless Headset TWS Ipx7 Earbuds Stereo Headset Feature Bluetooth version: V5.0 dual modes Distance: 15-20 meters Battery: Rechargeable lithium battery 55mAh Full charge time: 1.5 hours Play time: about 3.5 - 5 hours * 4 Earplug charging current: 50mA Microphone sensitivity: -382dB Frequency range: 20~2000Hz Headphone weight: 7.5g Waterproof: IPX7 Colours: Black/Green/ Pink Charging box: Battery: Rechargeable lithium battery 650mAh (providing 3-4 times power) Full charge time: 2 hours Input: 5V 500mA Output: 5V 100mA Size: 58 * 10 * 13mm Weight: 55 grams Bluetooth 5.0 Full Wireless Technology with HiFi Sound Quality Equipped with the most modern Bluetooth 5.0, the transmission speed is twice as high as that of the 4.2 version. Experience simple, fast and non-disruptive transmissions. Install CVC 8.0 to reduce noise from the inside and outside. Comes with a built in microphone, completely wireless. Also it support Voice + and - Large Capacity Battery & IPX7 Fully Waterproof Comes with a 650mAh battery box which you can charge it for many times. Enjoy music in the park on the weekends and wherever you want. Because of the IPX7 waterproof your headphones are protected from sweat, water and, rain, etc. Play music during your workout. Note: The case is not waterproof. Lightweight and Comfortable Adapt to the design appearance of cochlea and provide three adjustable sizes (S, M, L) of silicone earplugs, which solve the problem of wearing pain and easy falling off of traditional earphones. Very light weight, only 7.5g per earbuds make your ears never hurted. Two use models Ear-hook or In-ear sports Bluetooth headset, never worry it dropping or lost when running.