This is an Auto Gauge boost meter. I purchased it last year and used it on my car for about six months. It works without any problems, but since it's an older product, please understand that it's sold as-is, with no returns. The filter and hoses are not included. The wiring is short, so you may need to extend it yourself. I will ship via Rakuraku Mercari. Instant purchase is welcome. Please check the four images.