Firstsing Mini Wireless Bluetooth Speakers Net Cloth Waterproof Bluetooth Speaker HD Stereo Speaker Built in Mic For Outdoor Sports

Feature:
1)Wireless high quality stereo Bluetooth speaker
2) High quality Sensitivity micro bluetooth speaker
3) Call pick up/hang up function,volume can be adjusted.
4) Built in li-ion battery capacity 400mAh
5) Mini USB power charging port
6) Support micro sd card reader
7)Keychain for outdoor

Specification:
Bluetooth Version: 2.1+EDR
RF range: 10M
Frequency response: 100Hz-20KHz
Playback time: 3-6hours
Charging time: 3 hours
Capacity:3.7V/400mAh
Charging input: DC 5V
Microphone sensitivity: -40dB
THD≤1%
Loud speaker output: 3W
Color : Blue orange red black
What is in box:
1 x Waterproof Bluetooth Speaker
1 x USB power cable