The horn size: 13.2 mm 
Headset size: 40X18X16mm
Charging bin size: 61X46X25mm
Bluetooth version: 5.0+EDR
Bluetooth support: Phone hands-free
Frequency response range: 20HZ-20khz
Bluetooth support protocol: AVRCP/A2DP/HSP/SPP
Transmission frequency: 2. 4GHZ-248GHZ
Bluetooth reception effective distance: 10m
Battery capacity: 30mAh
With or without a microphone: Omnidirectional
Bluetooth working time: 4-5h continuous playback
Bluetooth standby time: 100H
Input voltage/current: equipped with a special charging bin
Charging pod for headphones :4-5 times