Description1 . Support Bluetooth mode / TF card mode / AUX mode2 . Support Bluetooth device connection music playback and two-way call function3 . Support TF card APE, FLAC, MP3, WAV, WMV music format playback4 . Support TF card management, USB sound card5 . Built-in noise-canceling HD microphone, one key to answer, support hands-free call6 . Fashionable design, compact size, easy to carry7.support for cell phone power indication, audio body with 4 grid power indicatorBluetooth chip : Torch power 2185Bluetooth version: V5.0+EDRSound system : stereo (dual-channel)Battery capacity: 2000mAh/3.7vDrive unit :45mm Rated power :5W*2Speaker power :RMS 5W*2 Impedance 4ΩFrequency response range :90Hz-16KHzProduct weight :387gProduct color :Black/GrayCharging time: about 4 hours Talking time 10 hoursMusic duration :8-10 hours