Please be sure to read my profile before purchasing. The A8 series, often seen on Mercari, is known to generate high-frequency noise, and there are many variations in individual units. However, this product features noise reduction, which significantly suppresses noise, and also offers high sound quality and low latency. While I wouldn't go so far as to say it's for recording, it delivers high sound quality and low noise that rivals more expensive products. This is a rare item, as it's difficult to obtain, so if you're considering wireless, please purchase it as soon as possible. I have over 40 years of experience with music and musical instruments. I can answer even slightly more niche questions. Please rest assured. Please keep your product questions concise. I will check the operation before shipping, so please be assured (^^) It's a type that selects from four channels, and you can use four simultaneously without interference on the same system. This is a wireless system compatible with instruments that use amplifiers, such as electric guitars, acoustic-electric guitars, basses, and keyboards. You won't need cumbersome cables, making it perfect for practice at home or in the studio. It's also ideal for stage performance practice. Pairing is automatic, just by turning on the power of both the transmitter and receiver, making it extremely easy to use. I have confirmed the connection between the instrument and the amplifier or mixer, but I have not confirmed the connection with smartphones, other audio devices, or audio equipment such as monitor speakers. 【Product Specifications】 Audio Response Range: 20Hz～20kHz Frequency: 2.4G band Transmission Range: Up to 40M (without obstacles) Transmission Delay: Less than 4ms Power: Built-in lithium battery Charging Port: Micro USB 【Notes】 Due to the low price, I will take out the contents and wrap them in bubble wrap and ship them via Yu-Packet Post. Please note that there is no outer box. Please be sure to read the notes in my profile before purchasing. #ElectricGuitar #Bass #AcousticElectric #Keyboard #Synthesizer #EffectsPedal #Tuner #Overdrive #Marshall #Gibson #Fender #Stratocaster #LesPaul #GuitarAmp #BassAmp 200