Feature: 1. SURROUND SOUND: Support 360 degree surround sound, 2.2inch speakers with large diaphragm, the treble is magnificent and transparent, the midrange is clear and dynamic, and the bass is deep and powerful. 2. SELF REVERBERATION: Speakers with KTV level surround sound, wireless microphone comes with five karaoke sound effects, make singing become fun. 3. RGB LIGHTING: 9 kinds of 16.8 million colors, with RGB light switching, exudes a fashionable and cool feeling, allowing you to entertain the game with more feeling. 4. LARGE SPEAKER, LONG LIFE: Equipped with a 57mm 4Ω 5W speaker with 1800 mAh high capacity lithium battery, allowing you to listen to songs anytime and anywhere. 5. APPLICABLE SCENE: Karaoke machine set is compact and portable, easy to carry and use, suitable for outdoor, indoor, teaching and live broadcasting scenarios. Specification: Item Type: Karaoke Machine Set Material: Plastic, Electronics Speaker: Speaker Model: K16 Speaker Bluetooth Version: 5.3 Speaker Power: 5W Speaker Diameter: 57mm/2.2in Speaker Frequency Range: 20Hz to 20KHz Memory Card: Supports Up to 128GB Memory Card (not Included) Battery Type: Built in 1 x 1800mAh Battery (included) Microphone: Microphone: 2.4G Wireless Transmission Pickup: Back Pole Type Condenser Microphone Battery Type: Built in 1 x 400mAh Lithium Polymer Battery (included). Package List: 1 x Bluetooth Speaker1 x Microphone1 x Charging Cable1 x Instruction Manual