Product functions and features:1 Support Bluetooth wireless transmission2 Built-in microphones for hands-free calling3 Using high-quality audio decoding chip, allowing you to experience perfect sound quality4 Unique waterproof function design, can be used in the bathroom, beach, swimming pool, at the same time of leisure, enjoy relaxing and wonderful sound5. Simple and stylish shape; easy to carry around; the chassis can be sucked on mobile phones, Apple tablets and desktops; very practical; colors meet the needs of different people.Product parameters:Color: orange + blackBluetooth Version V: 5.0Frequency: 2.402-2.480GHzOutput power: 3WMicrophone sensitivity: -32dbReceive sensitivity: higher than 82dBmReceiving distance: 10-15 metersData Transfer : Greater than 3.0 Mbps/secUART data transfer rate: 115200bpsBluetooth antenna: built-in Bluetooth antennaCharging voltage: 3.7V 4.2V DCOperating voltage: 4.8V 5.5V DCPlaying time: 3 to 8 hours (depending on whether the volume is too low, the time varies)Charging time: 2-3 hours