Designed to work in conjunction with the Haltech Elite range of ECU's the TMS-4 supplies individual tyre pressure and temperature information. This information includes high pressure, low pressure, high temperature, air leak detected and sensor battery low voltage which can trigger trouble codes and flag a warning alarm if a dash display is used.Suitable for use with Haltech Elite ECU'sProvides tyre pressure and temperature information to trigger trouble codesParameters include: High pressure, low pressure, high temperature, air leak detected, sensor battery low voltage and sensor signal lostThe Haltech TMS-4 is available with 2 different types of sensor:Internal sensors: These sensors replace the tyre valve and require the tyre to be removed from the rim for installation.External sensors: These sensors simply replace the valve cap for quick and easy installation. The sensors are supplied with anti theft lock nuts.