J.D. Power Wireless Earbud in Charging Case with Built in Microphone

J.D. Power Wireless Earbud in Charging Case with Built in Microphone. Laser engraved on the metal casing. 

1.Bluetooth V4.2
2. Rated Power: 20mW
3. Working Distance Range: ≤ 10 M/ 33FT
4. Frequency Range: 2400-2480MHz
5. Charging Voltage: 5V 200 mA
6. Charging port: Micro USB
7. Battery Capacity: 55 mAh each earbud, 450 mAh charging box
8. Charging time: 1-2 hours for the earphone, 3-4 hours for the charging base
9. Playback time/Music time: ≤ 2.5 hours
10. Talk Time: &le 2.5 hours
11. Standby Time: ≤ 150 hours
12 .sensitivity:93dB±2dB
13. Hands free call with built-in superior HD microphone