Alpha Works Flex 680 True Wireless ANC Headphones

Specifications:
Audio
Noise reduction: 25dB
Driver Size (mm): 40mm
Channel: Stereo Sound
Frequency response: 20Hz-20KHz
Battery & Power
Battery: 500 mAh
Play time
ANC Off Up to 40 hours
ANC On Up to 30 hours
Charging time: 4 hours
With Charging cable: USB-C, 50cm length

Connectivity
Bluetooth version: V5.4
Supported Bluetooth Profile: A2DP, AVRCP, HSP,
HFP
Bluetooth distance: 10m
With AUX cable: yes