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By certification 
Bluetooth speaker with Micro SD Card with FM
Sensitivity micro bluetooth speaker
Call pick up/hang up function,volume can be adjusted.
Built in li-ion battery capacity 600mAh
Mini USB power charging port
Built in FM radio voice reminder function.
Built-in micro sd card slot,support micro sd card read
RF range: 10M
Frequency response: 100HZ-20KHZ
Output: 3W
S/N ration: 75db
Built-in Lithum battery: 600mAh
Charging voltage: 5V
Charging time: 2-3 hours
Playback time: 6-7 hours
Sensitivity micro bluetooth speaker
Call pick up/hang up function,volume can be adjusted.
Built in li-ion battery capacity 600mAh
Mini USB power charging port
Built in FM radio voice reminder function.
Built-in micro sd card slot,support micro sd card read
RF range: 10M
Frequency response: 100HZ-20KHZ
Output: 3W
S/N ration: 75db
Built-in Lithum battery: 600mAh
Charging voltage: 5V
Charging time: 2-3 hours
Playback time: 6-7 hours
