Our digital close couplers are compatible with Roco close couplers and fit every car with a NEM 363 coupler pocket. The couplers can be used with voltage from 12V to 22V and can be released up to 10 seconds. Permanent electric contact destroys the coupler, please use a digital decoder with time control! Suitable couplers: Roco Kurzkupplung (close coupler) Coupler for Single Units Coupler for NEM 363 Coupler Pocket, not included