The present invention provide a motion detection circuit for a handheld item detection system, where the motion detection circuit includes an accelerometer outputting at least one signal corresponding to a measured acceleration. At least at one piston end face the sealing lip itself constitutes the buffer body and has the impact face at its end, groove-like recesses being formed on the inner periphery of the sealing lip with a distribution in the peripheral direction, such recesses opening toward said impact face. The cable further includes an additional layer of material between the outer dielectric and the shield conductor of suitable composition for reducing triboelectric current generation between the outer dielectric and the shield conductor to less than that which would occur were the outer dielectric and the shield conductor to directly adjoin each other. A bet comprising a plurality of bet components is generated, one or more of the bet components being defined by the particular race participants and the particular possible positions of race participants determined for at least one of the intermediate points. The data measured by the sensors is logged and is wirelessly transmitted when a preset value of pressure is detected by the pressure sensor.