Technical Specification:

Brand: Havit
Model: Havit H610BT
Chip :JL6925F
Bluetooth Version: V5.0
Battery: 200mAh
Product Size: 175*195*70mm
Net Weight :142g
Wireless Working Range: 10M (Without Obstacles )
Speaker: Φ40mm
Speaker Sensitivity: 110±3dB At 1KHz;1mW
Profiles Supported: HFP/HSP/A2DP/AVRCP
Impedance: 32Ω±15%
Speaker Frequency: 20Hz-20KHz
Input Voltage / Current: DC 5V /200mA
Playtime: 3-4H
Talk Time: 3-4H
Standby Time: 300H
Voice Chat: Supported
Material: ABS
Function: Bluetooth+Micro SD+AUX+FM

Features:

With adjustable slider and soft padded headband allow you to get the most comfortable enjoyment.
Built-in 200mAh ultra-large capacity rechargeable battery, can work for 3-4 hours on a single charge.
Built-in dual 40mm large-aperture drivers, produce an immersive real-life music experience.
Enhance the sound insulation, easy to isolate external noise