I've charged it several times. Power-on confirmed. I've also confirmed that sound comes out through a guitar. I think it's clean with no noticeable scratches or stains, but please consider it as used. [Description] Guitar wireless system transmitter and receiver, 70 channels, plugs directly into the guitar, electric guitar amplifier, electric guitar, USB rechargeable, no cables needed, no interference, power display, convenient to carry. The high-frequency delay is less than 3ms, with no delay or signal loss. The effective range is approximately 25M to 40M. Transmission range: 25-49m No claims and no returns, please.