Mechanical RV alarms are devices designed to protect your vehicle from theft. They work by disabling or locking key components of the RV so they cannot be operated or used without a special key. Here are some of the most common types of mechanical RV alarms:

Steering wheel lock : These devices prevent the steering wheel from turning, making it difficult for thieves to steer the vehicle. They can be a simple mechanical lock or more advanced systems that also cover the steering wheel.

Gearshift lock : A device that prevents the gear lever from moving, preventing the camper from moving. Some locks are designed to be invisible, increasing security.

Pedal lock : Devices that lock the vehicle's pedals, making it impossible to use the accelerator or brake. This type of anti-theft device is particularly useful for preventing thieves from driving your camper.

Wheel lock (rim lock) : This is a lock that is attached to the wheel rim, preventing the vehicle from rolling away. It can be an effective protection during prolonged parking.

Door or Dash Lock : There are also devices that physically lock the door or dashboard controls to prevent direct access to the engine or vital controls of the RV.

Chains and padlocks : A very simple system that can be useful for preventing the opening of doors or windows, or for locking moving components such as tanks or the tailgate.

If you're looking for a mechanical anti-theft system for your camper, it's also important to consider the device's reliability and ease of use. A good system should be robust, but also convenient to use, preventing it from causing you too much inconvenience when accessing or driving your camper.