Feature: 1. Built‑in 2pcs 15 W speakers with multi‑function, can achieve a full range of stereo reproduction. 2. It makes the subwoofer stronger and more balanced, and the Voice Cancel feature lets you cancel the voice with a single press. 3. Built‑in Bluetooth 4.2. Plug in a USB/small memory card and record audio through a microphone. 4. Karaoke machine can convert sound field effects into standard, pop music, rock music, classical music, treble, subwoofer, and share with family and friends. 5. The speakers have built‑in rechargeable 7.4V/2000mAh high‑capacity lithium‑ion batteries and 3.7V/1500mAh high‑capacity lithium‑ion batteries, which provide up to 3.5 hours of continuous music playback at maximum volume. The speaker acts as a charging station, so it can be easily recharged at the same time. Specification: Item Type: Bluetooth Speaker Material: ABS Color: As Pictures Shown Weight: Approx. 2542g/89.7oz Bluetooth: 4.2 Bluetooth Name: SDRD Frequency response: 100Hz-18KHz Power charger: 5V/2A Battery capacity: 7.4V/3000mAh Power output: 15W+15W Frequency: 100 Hz - 18 KHZ Drive unit: 2 x 4IN S/N: ≥80dB Microphone battery specification: 1500mAh 3.7V Microphone charging time :1-2 hours Microphone type: single point capacity Mode: Bluetooth /Small Memory Card/USB/AUX/ Karaok. Package List: 1 x Karaoke Machine 2 x Microphone1 x Charging Cable1 x Audio Cable1 x Manual Note: