Divoom Voombox-ONGO is a portable rugged Bluetooth Speaker System. It wireless connects to any Bluetooth-enabled device, such as your Smartphone, tablet, or laptop as well as providing water resistant and speakerphone solution. Enjoy impressive audio output even with a product as small as Voombox-ONGO. The Voombox-ONGO product features are latest 4.0 Bluetooth technology, powerful built-in microphone for hands free calls, built-in Li-ion battery gives you 8 hours non-stop music and included bike mount holder lets you enjoy your music while riding. In addition, the Voombox-ONGO product specs are dimensions 140L x 60W x 73h mm, Output power is 7 W (3.5W x 2), signal to noise ratio is ≥76dB, battery capacity is 100 mAh, battery voltage is 3.7 volts, wireless range is over 30 feet, Bluetooth compliant is Bluetooth V4.0, Bluetooth profile support is A2DP Stereo, talk time is up to 8 hours and microphone sensitivity is -40 db.