describe:1. Wide working range: The working range is up to 33 feet, AUX, TF/USB inputs are easy to connect. Audio transmission can be recorded via a microphone plugged into a USB/TF card. Additionally, the USB port can charge your phone/tablet.2. Easy to match: The karaoke machine has 2 wireless microphones with interesting voice changing function and can be easily charged. Speaker and microphone automatically pair when turned on.3. Powerful speakers: Powerful speakers with excellent stereo sound quality bring you a truly immersive listening experience. The built-in DSP chip allows the speaker to adapt to different scenarios without distortion.4. Different sound field effects: Karaoke speakers can convert the sound field effects into standard, pop, rock, classical, treble, bass, etc. Share your microphone with family and friends.5. Built-in large battery: The powerful rechargeable lithium battery of the speaker and microphone can provide you with up to 3.5 hours of uninterrupted music playback at maximum volume.Features:Name: Wireless Karaoke Machine Speaker.Wireless connectivity: 5.0.Supply voltage: 5 V.Frequency range: 20 Hz - 20 KHz.Transmission distance: 10m.Battery capacity: Built-in 3000mAh lithium battery.Microphone battery capacity: 1500mAh.Charging time: about 1.5 hours.Play time: about 5 hours.Color: red/black/silver.Product size: L5.5*W6.1*H6.2 (L138*W155*H158mm)Package:1 wireless microphone speaker.2 microphones.1 x USB cable1 x instruction manualNotice:Due to lighting effects and shooting angles, there may be some slight differences in the color of the item and the color shown in the picture.There may be errors in product dimensions due to manual measurement.