Features: 1. Dual Wireless Microphones: The dual wireless microphone karaoke device contains two wireless microphones. The karaoke machine acts as a microphone charging station and can be easily charged at the same time. The speaker and microphone will automatically connect when powered on. The microphone has an interesting voice changing function. 2. Long battery life: The karaoke speaker system is equipped with a high-efficiency rechargeable battery, and each microphone is equipped with a rechargeable battery, which can play for 4-5 hours after a full charge. Use the included mini USB cable to easily charge the machine. 3. Wide compatibility: The portable speaker supports playing music through Bluetooth compatible connection, USB port, AUX port or TF card. More connection selection modes. 4. Interesting voice changer: Five interesting sound effects: male to female, female to male, baby voice, Warcraft voice and voice, meet more needs and bring more fun to use. The variable voice microphone is suitable for car karaoke, home, party, classroom, speech and outdoor activities Parameter Description Support various smartphones and tablets of Apple and Android systems. Speaker power: 10W Signal-to-noise ratio: ≥60dB Frequency response range: 40~ 20KHZ Audio source interface: 3.5mm stereo headphone plug Battery: Built-in 1500MAH lithium battery in the host, 500MAH each in dual Bluetooth microphones Charging time: 1~3 hours Playing time: 2-4 hours at medium volume after full charge Power adapter requirements: Output voltage: 5V Current 1A/2A Function: Play MP3 format music in U disk/TF card, connect mobile phone or tablet karaoke via audio cable (not included) or Bluetooth, use as microphone for speech Material: Plastic colour: White Package Contents: 1 x Speaker 2 x Mi