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specification:
1. Bluetooth version: V4.1
2. Bluetooth distance: 10 meters
3. Frequency range: 2.4GHz-2.48GHz
4. Operating distance: up to 10m (free space)
5. Bluetooth profile: A2DP, AVRCP, HSP, HFP
6. Standby time: up to 50 hours.
7. Operating voltage: DC5V / 130MA
8. Charging: includes cable (without adapter)
9. Battery: built-in polymer lithium battery
10. Talk time / music playing: about 2-4 hours
11. Charging time: about 1-2 hours.
12. Frequency response: 20Hz-20kHz
13. Working temperature: -10 to 50C
# Bluetooth # headphones # ForAndroid # Bluetooth headphones # headphones # Earbud # wireless # headphones # in-ear # reduction # Earbud # for smartphones # iPhone