Drive: 40mm Impedance: 32 OHM Bluetooth version: V5.0 Bluetooth frequency band: 2.4GHz Power level: CLASS II Bluetooth distance: barrier-free 10 meters Frequency response: 20-20000Hz With A2DP/AVRCP high-quality stereo audio transmission and remote control protocol Charging time is about 1 hour Talk time is about 10-12 hours Music time is about 2-3 hours Standby time is about 120 hours Battery capacity 400mah/250mah Charging power supply: DC5V power supply [round hole interface] (computer USB port, mobile phone charger, car charger) Compatible mobile phone: compatible with Android, Apple, Microsoft, Saipan system 99% of mobile phones with Bluetooth function
