1. Contains 3 18650 lithium batteries, which can be directly and can work for 3-5 hours after charging for 2 hours. We advocate environmental protection and can protect the environment more. 2. Suitable for party speakers, it can be connected to any speaker with a microphone interface by connecting a wireless receiver, and can also be connected to a mixer as an extension of a wireless microphone. 3. Multiple compatibility: The DG6 wireless microphone is only suitable for input devices with a microphone interface of 6.35mm (1/4 inch) or 3.5mm (1/8 inch). 4. Automatic frequency recognition: Both the receiver and the microphone are equipped with a display screen, and the signal is automatically connected. You can use it directly time you turn it on without setting. 5. Anti-interference function: The karaoke wireless microphone is equipped with an automatic scanning function, which allows the system to search for the channel with the least interference to pair with the transmitter. Reduce interference between channels. Wireless microphone working distance:50 meters bandwidth:60MHz Signal-to-noise ratio:96dB Receiver sensitivity:-95dBm Microphone type:dynamic microphone Pickup method:cardioid bandwidth:60MHz Transmit power:10mW Frequency response:50Hz-18KHz Dynamic range:96dB Due to different batches, there may be differences in product appearance and printed text, which not affect use. Colour:Black Material:Plastic Package Contents: 1 * Wireless receiver 2 * Wireless microphone 3 * 18650 lithium battery 1 * Charging cable 2 * Microphone protection ring 2 * Sponge microphone box 1 * 6.35mm to 3.5mm converter 1 * English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.