Item Type: Karaoke Machine Material: ABS Bluetooth Version: V5.0 Driver Unit: 4IN Frequency Range: 100Hz-18KHz Signal To Noise Ratio: 80dB Output Power: 15W Microphone Distance: Approx. 10m/32.8ft Charging Interface: Type C Microphone Function: ECH, Volume Level, EQ, Automatic Charging Speaker Function: Singing Mode, RGB Ambient Light, BT, USB, Memory Card, AUX (Memory Card Supports Up To 128GB, Shipping Not Included) Speaker Battery Type: 2400mAh Lithium Ion Battery (Built In) Microphone Battery Type: 2 x 1200mAh Lithium Ion Batteries (Built In) Size: Approx. 17x17x14cm / 6.7x6.7x5.5in Package List 1 x Speaker 2 x Microphone 1 x Sound Cable 1 x Charging Cable 1 x Instruction Manual Please allow some error due to manual measurement. 1DIGITAL SIGNAL PROCESSOR: With sound drivers and advanced digital signal processor, the sound is more accurate and the volume is more moderate and balanced without any noise. Press and hold the volume button to adjust the volume. 2BLUETOOTH 5.0 CHIP: Portable karaoke machine has a built in bluetooth 5.0 chip for wireless streaming, ensuring instant pairing and providing more stable transmission and longer range. 3COMPATIBLE DEVICES: Portable karaoke machine supports micro memory card, flash USB and AUX input connections. Compatible for Android phones, TVs, tablets, and computers. 4WITH 2 UHF MICROPHONES: Bluetooth karaoke machine with 2 UHF microphones provides higher power output, wider frequency shift, better dynamic range and signal to noise ratio. 5LONG LIFE SPAN: Bluetooth speaker has a built in 2400mAh high efficiency lithium ion battery to ensure uninterrupted music playback, and the microphone has a built in 1200mAh high efficiency lithium ion battery. 6LIGHTWEIGHT AND PORTABLE: Karaoke machine is lightweight, compact and portable for you to enjoy with your family and friends, perfect for family gatherings, classrooms, presentations and many other occasion.