| 摘要 |
In order to provide an accessory which can be operated by a sportsperson, vehicle driver or machine operator who cannot readily move their hands away from control means such as a vehicle steering wheel (1), there is a first part (2) which can be operated by a sportsperson, driver or operator, which is mounted on a part of the vehicle, sporting equipment or machine which is normally held by the operator such as the steering wheel (1), and a second part, comprising a receiver (7) for receiving signals from the transmitter and a stopwatch (8) controllable by the receiver. The transmitter transmits signals to the receiver (7) by cableless link, for example infrared.
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