Karaoke Systems descriptions： We use high-quality raw materials, all materials are very suitable for the product, please rest assured to buy. Handheld Wireless Karaoke Microphone Player, Home Echo Mixer System. Specification: 1.Color: Black 2.Material: ABS + Metal 3.Product Size: About 10cm*8cm*1.9cm (L*W*H) 4.Input Voltage: AC 100-240V 5.Frequency: 50--60HZ 6.Output Voltage: DC 5V 7.Pickup: Low Noise Moving-coil 8.Microphone Type: Wireless 9.FM Mode: FM/VHF 10.Frequency: 230MHz-270MHz 11.Microphone Core Sensitivity: -76 ± 3DB 12.Transmit Power: 16DBm 13.Effective Distance:> 20M 14.Receiver Sensitivity: -105DB 15.Frequency Response: 50HZ-17KHZ 16.Signal to Noise Ratio:> 100dBV 17.Distortion: <0.5% 18.USB Interface Type: Mini USB 19.The USB Audio Port Can connect Android box, computer and Smart TV 20.System Requirements: for Android 4.1 or Above Package Included: 1x Main Unit 2x Wireless Microphone 1x USB Cable 1x DC Power Cable 1x Micro USB Cable 1x 3.5mm Audio Cable 1x 3.5mm to 2RCA Jack Audio Cable 1x English User Manual. Products number : SOMONO103287