①. 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) ②. Speaker with two internal magnetic sound, 3 speakers covering 200㎡. The highs are clear, the mids are powerful, and the bass is thick. ③. Mini karaoke machine with 2 wireless microphones, with digital processing chip, provides better sound, enjoy KTV sound, suitable for work or karaoke entertainment. ④. 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. ⑤. 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. ⑥. Bluetooth speaker and 2 microphone set, modern design, beautiful, small and exquisite, suitable for parties, travel, conference rooms, weddings, stages, etc. ⑦. 1 speaker; 2 x microphone; 1 x charging cable; 1 x instruction manual ⑧. Manual measurement, please allow some errors.