Ⅰ. Item Type: Karaoke Machine; Material: Plastic, Electronics; Speaker Size: Approx. 8 x 8 x 8.5 cm / 3.1 x 3.1 x 3.3 inches; Microphone Size: Approx. 13.5 x 3 x 3 cm / 5.3 x 1.2 x 1.2 inches; Speaker BT Version: BT 5.3; Speaker Handset Diameter: Approx. 57mm/2.24in; Speaker Audio Signal Power: 6W; Speaker Operating Voltage: 3.7V; Speaker Frequency Range: 20Hz-20KHz; Speaker Reverb: Aftersound Effect; Memory Card Slot: The speaker's memory card slot supports up to 512G memory (Not included); Microphone Charging Time: About 2.5 hours; Battery Type: Built-in 1200mAh speaker, microphone x 2 Built-in 400mAh polymer lithium battery (included) Ⅱ. Speaker with two internal magnetic sound, 3 speakers covering 200㎡. The highs are clear, the mids are powerful, and the bass is thick. Ⅲ. Mini karaoke machine with 2 wireless microphones, with digital processing chip, provides better sound, enjoy KTV sound, suitable for work or karaoke entertainment. Ⅳ. Innovative design, glazed speaker light effect into the karaoke speaker. Up to 16 independent light beads, various RGB singing light effects to enhance the music atmosphere. Ⅴ. Wireless karaoke machine, premium Bluetooth 5.3 chip, can be connected to TV, mobile phones, simple and convenient to use, easy to enjoy a KTV experience. Ⅵ. Bluetooth speaker and 2 microphone set, modern design, beautiful, small and exquisite, suitable for parties, travel, conference rooms, weddings, stages, etc. Ⅶ. 1 speaker; 2 x microphone; 1 x charging cable; 1 x instruction manual Ⅷ. Manual measurement, please allow some errors.