Product

GK-D28

Bluetooth Version V6.0
Bluetooth Solution Jerry 6983D2
Audio Encoding Protocol SBC
Effective Range ≥ 10 meters
Headphone Battery Specification 30mAh Protection Board
Headphone Charging Time ≈ 1.5 hours
Charging Box Charging Standard DC 5V1A
3 times for headphone charging
Speaker Size: Φ 13mm
Speaker Impedance: 32 Ω± 15%
Frequency Response Range: 20Hz~20KHz
Weight (Single Headphone) ≈ 3.0g
Weight (Complete Set) ≈ 34.3g
Supports Bluetooth Protocol HFP, A2DP, AVRCP
Signal Power Level: Class 2
Operating Frequency: 2.4GHz Hz
Earphone charging voltage DC 5V ± 0.2V
Charging case battery specification 300mAh protection board
Charging case charging time ≈ 1.5 hours
Connection standby time ≈ 40H
Cumulative battery life about 17H
Speaker sensitivity 109 ± 3dB
Charging case size 54.8 * 44.8 * 26mm
Single headphone size 30.5 * 18.9 * 17.5mm

The product normally includes one side with laser engraved logo and one side with parameters. If there is a silk screen requirement, the standard price is 0.3 yuan per side. Other requirements will be reported separately