Microphone Type: Children's Microphone, Computer , Conference Microphone, KTV/Performance Microphone, External Sound Card Microphone... Suitable for: Home, Computer, KTV, Live Streaming, Other Wireless Available: No Polarity: Cardioid Patented Source: No Built-in Battery Capacity: 500mAh-800mAh (inclusive) Signal-to-Noise Ratio: equal 70dB Frequency Response: 60Hz-15kHz Rated Power: 2 Power Supply: Built-in Lithium Battery Rated Voltage: 3.7 Battery Life: 6-8 hours (inclusive) Usage: Handheld Microphone Head: Dynamic Built-in Battery: Built-in Battery Color:White Material:ABS + Metal Package Contents: 2 * Wireless Microphone 1 * Receiver 1 * USB Cable 1 * English instruction 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.