of cashcard reminder for in-vehicle unit (for singapore bikes)

Cashcard Reminder for In-Vehicle Unit (For Singapore Bikes): Gadget attached to the In-Vehicle Unit. Alarm buzzes if engine is cut off and your cashcard is still inside the IU.

A device to be installed to alert the rider to take out their cashcard after use. This product is hand made by the creator and is use to prevent other from losing their card