Please use ebay.com to all purchase. Keep in mind that in case of lost package (item not received) I can fill a claim to post office after 60 days of shipping only. This is International post service regulation. I will refund you if you do not receive the item in 60 days. No need to escalate disputes on Ebay. Please communicate. All negative feedback will be reported as Buyer protection abuse. If you do not agree with the conditions above, do not buy. Look anywhere else. It is knock detection device with analogue output 0+5V. Brand new. Hand made. Very bright LEDs which are clear when light is off. It is hard to miss the detonation signal. Dimension: 65mm x 50mm x 20mm (L x B x H) exact dimension may vary. No brackets. Weight is ~150g Wire Length: ~1.5m by default. Diameter of sensor cable is 3mm. Device has common ground, red wire (shielded cable) to sensor signal, separate red wire to +12V. Blue wire is output 0+5V. Maximum load is 100mA. Mounted in a black plastic (ABS) box. SENSOR IS NOT INCLUDED. Customers use sensors: Honda #30530-PV1-A01; BOSCH 0 261 231 188 Delphi AS10134-12B1 You can prevent damage to your engine by monitoring the detonation signal. It appears if air-fuel mixture is wrong for some conditions. Device monitor detonation at begin. You have time to react and save your engine. Device work with noise signal at unique frequency. Detonation of most car is near to the same frequency. That mean that this device fit to all car. If you are unsure in it, do not hesitate to ask me about it. Very useful in race condition where no time to look at other gauges (EGT, A/F etc.). It could be mounted straight on the wheel or dashboard or anywhere where the driver could see that gauge. You do not need to focus sight to gauge to see what result shown by device. When detonation appear, you will see very bright LED light on. Led brightness is bigger than stop signal of some car. You couldn't miss that signal. Troubleshooting: 1. Q: Gauge is connected to sensor and power supply. One green LED lights on only. Engine running at idle or accelerated. No more LEDs light on in additions. A: Check first green led when accelerating. It must change brightness. If not, then check wire connection of sensor. Especially ground connection of sensor. Resistance of it must be lower than 100Oms. 2. Q: Gauge not work at all. A: Gauge is tested twice before shipping. First time after assembly, second time after fitting in the plastic box. It is impossible that gauge is damaged in post system if plastic box is OK. Check wire connection. Or it is possible that your OEM knock system not compatible with this gauge. Try to use other knock sensor. WARRANTY. Contact me if your gauge stops working and we will discuss it. Warranty void if device was damaged by car crash. I do not stockpile devices. I assemble it after order is received. I prepare the order in 1–2 weeks. Delivery takes: Australia, 20-25 business days. USA, 5-10 business days. Europe, 5-10 business days. No FedEx or DHL options available as both services charge over 150USD for delivery of single device.