Feature: 1. Stereo: Equipped with advanced digital signal processor, sound is clear and moderate volume. While playing music, press and hold the volume button to reduce volume. Small and portable, we can put it in the car, suitcase, bag 2. Multi Function: Wireless transmission via the latest built in Bluetooth 5.0 chip ensures instant pairing, providing more stable transmission and longer distance. It also supports memory card, USB connection, and can be used as a battery to charge your phone and microphone. It is suitable for your smart device, for Android phone, TV, tablet and computer 3. Multiple Voice Effects: 2 microphones are essential for duets and dances. With 2 microphones, there are 6 kinds of voice effects: original, catacoustic, male voice, female voice, doll voice, magic voice, which can meet more needs and bring more fun 4. Long Battery Life: Built in 3000mAh rechargeable lithiumion battery can play music for 5 hours continuously. Microphone built in efficient 1200mAh rechargeable lithiumion battery, strong practicability 5. Widely Used: This karaoke machine is perfect for family gatherings, classrooms, speeches and so on Specification: Item Type: Karaoke Machine Material: ABS, Metal, Electronic Components Product Size: Approx. 15x9x8cm / 5.9x3.5x3.1in Weight: Approx. 789g / 27.8oz Microphone and Speaker Battery Type: Lithium Battery (Microphone and Speaker Are Shipped with Built in Battery) Single Microphone Battery Capacity: 1200mah Speaker Battery Capacity: 3000mah. Package List: 1 x Karaoke Machine2 x Microphone1 x Data Line1 x Instruction Manual