Out of an ex race Caterham 7 is a Race Tech DL1, Dash 3, magnetic GPS sensor, throttle sensor, brake sensor and speed sensor plus plug. As well as an advance lap timer the Dash 3 displays speed, revs, and also has a built in shift light. Retails at £1,000. I've got it for sale at £300 on other sites but advertising here for £275.00. plus postage / collection .