This Bluetooth Wireless Karaoke Microphone has a long lasting battery capacity for any all night sing out. With HD bass and a treble button to adjust for clearer voice tone, you can enjoy clear, loud sound anywhere. With the built-in USB slot allow you the freedom to enjoy singing and listening music anytime and anywhere. With the wireless Bluetooth function,  you can connect to your smartphone for an easy access to your favorite song. Enjoy karaoke anywhere, indoor or outdoors.