This is a unit I was using until recently for presentations. Occasionally, there's a static-like noise from the speakers, so I'm selling it as a replacement for the same model. *It can be used, but it's considered a junk item, so please understand this before purchasing. Thank you for your consideration. ◯ YAMAHA STAGEPAS 400BT (Original price: ¥84,700) ■ Detachable 8-channel powered mixer (4 mono mic/line + 4 mono / 2 stereo line) ■ Equipped with "1-Knob Master EQ" ■ Equipped with high-quality SPX digital reverb (4 types) ■ Equipped with "Feedback Suppressor" ■ Equipped with ST/MONO switching function ■ Hi-Z compatible (ch4 only) ■ Equipped with phantom power ■ Equipped with monitor out / subwoofer out ■ Compatible with reverb footswitch connection ■ Contents: 8ch powered mixer, speakers x 2 ■ Maximum output: 200W + 200W ■ Maximum sound pressure level: 125 dB SPL ■ Channel EQ: HIGH/LOW ■ Effects: SPX digital reverb ■ Number of inputs: 8ch (mic/phone input = 1-4ch, phone/pin = 5/6-7/8ch) ■ Bluetooth: Bluetooth Ver.4.1, A2DP v1.2, Supported codecs: SBC/AAC, Maximum communication distance: approx. 10 m ■ Phantom power +30V (ch1-2) ■ Speaker unit: LF = 8-inch (20cm) cone / HF = 1-inch (2.54cm) compression driver ■ Frequency response: 55Hz～20kHz This is a used item, so no returns or claims are accepted.