New Bee M50 Manuel D'instructions page 6

VI.SPECIFICATIONS
- Bluetooth Version: V5.2
- Support Protocol: Headset, HFP, A2DP, AVRCP HSP
- Talk Time: about 24 hours
- Standby Time: about 60 days
- Charging Time: 2-3 hours
- Music Playback Time: about 20 hours (maximum volume)
- Transmission Distance: 15-20m (open space)
- Built-in dual microphones
- Charging Port: Type-C
- Working Temperature: -10°C—40°C
- Previous and next song selection
- iPhone/Android phones battery power display
- Support two phones connection
- Support mute function
VII.COMMON PROBLEMS
(1) It may cause disconnection when under low battery circumstances. In
order not to affect its normal use, please charge the headset in time.
(2) If the headset fails to turn on, please try to charge it first, and then try
to turn it on again after fully charged.
(3) If the battery is exhausted or has not been used for a long time, there
may be no signal light at the beginning of charging, but it will normally
light up in red after a few minutes.
(4) No sound from the headset.
------ Make sure the Bluetooth headset is turned on.
------ Make sure the headset is successfully connected to the phone.
------ Make sure that the distance between the headset and the phone
does not exceed the effective distance of 10 meters( about 32.8 feet).
------ Make sure that the music playback output selects the right