Pro-Series Tools Ultimate Tuning Screwdriver Flat blade screwdriver with Infra Red Temp Sensing device for accurate engine tuning The perfect nitro engine tuning tool has arrived! At one end of this wonderful tool is an accurate infra-red temperature sensor, & at the other is a flat blade screwdriver for tuning all three needles of your nitro or petrol engine! You no longer have to take two tools trackside or bashing to obtain perfect engine tuning. Simply use the HPI Ultmate Tuning Screwdriver to check the temperature of your Nitro engine & tune it properly. Use the cone protector to accurately aim your sensor at the plug to obtain the correct temperature reading, then spin the tool in the palm of your hand & tune your engine to perfection. The HPI Ultimate Tuning Screwdriver is supplied in a neat blister package which can be used to keep the driver in tip top shape whilst in your tool box. It's supplied with all you need. Just fit the batteries & the blade & your ready to go. The driver also comes with a high temperature rubber cone for accurate recording of temperature & also prevents the sensor from impact damage, whilst the hard cap is used to protect the sensor whilst the driver is not in use.HPI Ultimate Tuning Screwdriver is also Ideal for electric drivers wanting to keep an eye on their motor, speedo, battery or tyre temperatures! Other tool tips can be inserted into the blade end to suit your particular application. Specification: Measurement Temp: -33 to 220 C (-27.4 to 428 F) Accuracy: +/-2.5% Resolution: 0.2 C (0.5 F)