Bluetooth: Professional Wireless Bluetooth Set with everything you need. It's small in size but very powerful in sound and vocals. The built-in and powerful subwoofer provides ultra-deep bass and surround sound effects. It is a good choice for entertaining children, family and friends of all ages. Karaoke System with 2 Microphones: Portable System with two powerful microphones that can be used simultaneously. Singers can practice karaoke duets or engage in vocal competitions with family and friends. It's the perfect birthday Christmas holiday gift for kids boys girls teens. [Extensive Connection Methods] This Bluetooth karaoke speaker supports TF card/USB input when you enjoy your pre-made personal playlist. Stream all your favorite tunes easily with this Bluetooth compatible system. In addition, it also supports AUX input to connect to smart TV, if the singer wants to see the scrolling text while performing. Built-in Batteries: The mini karaoke system has a built-in 3.7 V / 3000 mAh rechargeable -ion battery for the Bluetooth speaker and a 3.7 V / 1500 mAh rechargeable -ion battery for two wireless microphones. Enjoy 3-5 hours of non-stop music playback on a full charge. This can also be by a power bank (need to support 5V/2.5A). No matter where you are, the karaoke party never stops PREMIUM SOUND QUALITY: Real karaoke equipment with super noise canceling ability and great audio amplifier for clear and loud sound. And by clicking the "VOVAL CUT" button to remove the old sound, kids are to have singing along to their favorite Colour:White Material:ABS Size:21x15.5x10CM Package Contents: 1 * audio 2 * Microphone 1 * Chinese and English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.