Features: Bluetooth version: V5.0Wireless frequency: 2.4GHZ Support: IOS, Android, Microsof and and Other Bluetooth-enabled device Support: HFP 1.7, HSP 1.2, A2DP 1, AVRCP1.6, SPP 1.2 and PBAP 1.0 Charging voltage / current: 5V / 1A Music time: 120 hours, equipped with charging bin Phone talking time: 150 hours, equipped with charging bin Charging time: 1-2hours Multi-function charging compartment, can be used as mobile phone holder, mobile power supply and earphone storage box. Transmission Distance: 10m Working Temperature: 10-50 ℃ Specifications: Speaker impedance: φ8MM 32Ω Microphone sensitivity: -42Db Frequency response range: 20-20000Hz Sensitivity: 120dB +/- 5dB Color: Black Material: ABS + PC Plastic Headphone battery capacity: 50mAh / single, with protection board Charging box battery capacity: 2000mAh, with protection board USB charging: The headset is full of 1hour, the base is full of 2hours Package List: 2 x Mini Bluetooth headphones (left and right) 4 x Spare Earplug 1 x Charging Box 1 x USB charging Cable 1 x Instruction Manual