The item is 2in1 Handheld Cordless Microphone Karaoke System Undirectional. It can be dual-used, and for wireless, it makes you sing free of dragging cord, and wired one lets you sing without the concern of battery power off. It is a good choice for you when choosing microphone karaoke system. Features - Color: Black. - Material: Plastic. - Size: 24 * 10.5 * 6.5cm(L * W * H). - 2in1 wired & wireless functions, combined both wired and wireless functions. - Fashionable and practicable design. - Light weight and portable. - Wireless let you sing free of dragging cord, wired let you singing without the concern of battery power off. - TRS 6.3mm jack(please make sure your device have this female port), working distance: 8-20m. Specification - Operating voltage: DC 1.5V. - The Length of the Microphone Cord: 2.5m. - Microphone sensitivity: -54dB 3dB(0dB=1V/Pa). - Direction: Un-directional. - Frequency response: 100Hz-10,000Hz. - Out put impedance: 600ohm. - Working distance: 8-20m. - Impedance: 600ohm. - S/N ration: 60dB. - Reception sensitivity: 30dB/uV. How to use: Wired: Make sure the battery is not in the microphone. And plug the cord to the microphone and your audio amplifier. Switch microphone to MIC position, and start to sing. Wireless: 1. Install batteries into both microphone and receiver. 2. Switch on them, the connection will be built easily. With LED indicator. 3. Switch microphone to ON position, and start to sing Switch microphone to MIC position when you need a short break. It won't collect other voices to the microphone if it does not work normal. 4. Use a screw or pin to press the RESET hole on the receiver If you don't use it for long time. Please take the batteries out to protect the microphone's components.Package list: 1 x Microphone 1 x Microphone Wireless Receiver(Not include battery) 1 x Microphone Wireless antenna 1 x Microphone Cord 1 x User Manual