hbs-900s bluetooth headphone 20 hours of playback super power tws stereo bass hifi headset earphone version 4.2

item no.: hbs900stransmission range: 10 metersfunction: battery display, call function, support music, multi-point connectionbluetooth protocol: 4.2channel: stereowhether single or both ears: bilateral stereocolor: black, white, gold, silverbattery capacity: polymer lithium battery 350malistening to music time: 15-20 hours up/down song/pause playbacktalk time: 20 hoursstandby time: 400 hourscharging time: 2 hoursproduct size: 167.3*135.6*16.9mm