Specifications:

Bluetooth version: BLUETRUM V5.0+EDR

Wireless frequency: 2.4GHZ

Supporting agreement: A2DP1.3/HFP1.6/HSP1.2/AVRCP1.6/D11.3

Transmission distance: 10 meters

Battery capacity: 50mAh

Charging voltage / current: 5V / 1A

Play / talk time: about 4 hours

Charging time: about 1 hour

Standby time: 120 hours

Speaker impedance: φ8MM 32Ω

Microphone sensitivity: -42Db

Working temperature: -10-50 °C

Gross weight: 4 g * 2

Charging case parameters:

Input voltage / current: 5V / 1A

Battery capacity: 1500mAh

Gross weight: 69 g

Color: black,  white

The Packing including:

1* Gift Box Packing

1* Pair Headphone

1* Charging Case

1* USB Cable

1* Manual

4* Earmuffs