I purchased this a few years ago, but only used it a few times indoors and kept it for a while. I am now selling it to organize my equipment. I have confirmed that it works. There is no crackling. There are no button malfunctions. I have also checked the other terminals. You can use it without any problems. There is no outer box, but all other accessories are included. In my subjective opinion, I think this is a very good product. I believe the main purpose of this product is for distribution, but personally, I was considering using it as a portable, simple recorder. However, I didn't have as many opportunities to record outside as I thought, so I'm unfortunately selling it. I will pack it carefully with plenty of bubble wrap and other cushioning materials. The following is a quote from ZOOM: ----------------- The LiveTrak series has evolved to meet the needs of creators. With six sound pads for playing jingles and sound effects, a smartphone input for mixing phone audio, and battery power for portability outside the studio. The 8-channel live mixer and recorder 'LiveTrak™ L-8' is born, making it easy to record podcast programs and mix live performances.