Awei Dual Dynamic Earbuds With Charging Case .

Bluetooth Version: 5.1 Support Protocol: HSP, HFP, A2DP, AVRCP Battery Capacity: 45mAh Capacity of Charging Case: 390mAh Input Charging Standard: DC5V Product Color: Black Charging time: 1.5H Talk Time: 4H Play Time: 3.5H Standby Time: 300H Best Transmission Distance <1M Maximum Transmission Distance: 10M Voice Prompt: Support Impedance: 16Ω±15% Sensitivity: 93dB Frequency Response Range: 20HZ-20000HZ Voice Prompt: English Double Horns: Φ6mm/16ΩWT0606*2