Hello, Here is my Phormula KS-Pro Knock Analyser that I've owned for roughly a year and used literally twice. It's a great tool to own if you're fitting parts yourself and don't have the time or money to have the ECU re-calibrated as soon as possible you can piece of mind knowing the hardware isn't putting the engine into unsafe running conditions whilst using the car before a mapping date or if you're a mapper or someone who is learning to map/hobbyist. This kit comes ready to go, knock analyser, knock sensor with cable, headphones, instructions and box. Purchased originally for £334 which includes everything you see, VAT and delivery from Phormula. Information below has been taken from their website. The Knock Analyser Pro (KS-Pro) is a high quality knock detection kit that allows the user to listen for knock whilst tuning an engine. The Knock Analyser Pro has been developed with the assistance of the UKs premier tuning companies and as such contains many features lacking from alternatives on the market. The kit contains everything necessary to listen for engine knock. This kit can also be plugged directly into the KS-4 when purchased with the KS-4 Interface Kit. Key Features: The case is ruggedised giving additional protection in a workshop environment. The high quality shielded Sensor Cable includes a Bosch Wideband Knock Sensor this provides excellent sound quality. The headphones are designed by a leading manufacturer in Hi-Fi equipment giving superb quality and comfort. The "Closed" design reduces background noise and provides crystal clear sound. The high visibility case and cables make it easy to find in a busy workshop environment Once paid for I'll dispatch with DPD next working day delivery. {}