Barely used. The KEYNICE H9 is a 5W output karaoke microphone with a frequency range of 100Hz-10KHz and a 2000MA battery. It has a built-in speaker in the microphone body. Almost unused. You can sing while playing karaoke music from your smartphone via USB. If you purchase two units, I will offer them for 2,500 yen. Product introduction https://www.youtube.com/watch?v=6uL3Bl7hUOo - Brand: KEYNICE - Model Name: H9 - Output Power: 5W x 2 - Frequency Range: 100HZ-10KHZ - Maximum Sound Pressure Level: > 115DB 1KHZ THD <1% - Battery Capacity: 2000MA - Charging Current: 660mA Thank you for looking.