U&I Bluetooth neckband BT VERSION - 5.3 TALKING TIME -22HOURS MUSIC TIME - 22HOURS STANDBY TIME - 250 HOURS CHARGING TIME -2 HOURS CHARGING TYPE - MICRO USB BATTERY CAPACITY - 90MAH TRANSMISSION DISTANCE -10M OUTPUT POWER - 3mWX2 SENSITIVITY-120DB- 1KHZ IMPEDANCE-16 FREQUENCY RANGE - 20HZ-20KHz INPUT POWER -1.0A SUPPORTED PROFILES - HSP, HFP, A2DP, AVRCP MIC SENSITIVITY- (-42DB) MIC IMPEDANCE - 2200