Item Type: Portable Karaoke Speaker System Material: ABS Bluetooth Version: V5.0 Driver Unit: 4IN Frequency Range: 100Hz to 18KHz SNR: ≥80dB Output Power: 15W Microphone Distance: 10m/10.9yd Charging Interface: Type C Microphone Function: ECH, Volume Level, EQ, Automatic Charging Speaker Function: K Song Mode, RGB Ambient Light, BT, USB, Memory Card, AUX (Memory Card Supports Up to 128GB, Not Included) Speaker Battery Type: 3000mAh Lithium Ion Battery (Built In) Microphone Battery Type: 2 x 1200mAh Lithium Ion Batteries (Built In) Speaker Size: Approx. 17x17x14cm / 6.7x6.7x5.5in 1、COMPACT AND PORTABLE: Portable karaoke speaker system is lightweight and compact, perfect for car karaoke, family gatherings, classrooms, presentations and many other situations. With RGB lights, you can enjoy karaoke nights at home with your family and friends. 2、ADJUSTABLE VOLUME: Bluetooth karaoke machine uses sound drivers and advanced digital signal processor for more accurate sound and moderate volume, balanced without any noise. Press and hold the volume button to adjust the volume to achieve the ideal volume. 3、BLUETOOTH 0: Portable karaoke machine is built with the latest Bluetooth 0 chip for wireless streaming, ensuring instant pairing and providing more stable transmission and longer range. Supports memory card, flash USB and AUX input connections Compatible for Android phones, TVs, tablets, and computers. 4、UHF MICROPHONE: Portable Bluetooth speaker with 2 UHF microphones is a must for duets and dances. Provides higher power output, wider frequency shift, better dynamic range and SNR ratio compared to VHF. 5、LONG BATTERY LIFE: This karaoke speaker has a built in 3000mAh high efficiency lithium ion battery to ensure uninterrupted music playback, and the microphone has a built in 1200mAh high efficiency lithium ion battery. Whether it's indoor dancing or outdoor party, you can play it as you like.