Four Position Control Offers four selectable positions off, L1, L2, L3 for seamless control of device operation. This allows you to adjust output to match comfort or performance needs. Compatibility Suitable for a variety of devices including electric heaters and massage equipment, making it a versatile addition to household setups. Effortless Installation Quick wiring with a user friendly design: simply strip the wires and push them into their designated terminals for a hassle installation. Durable ABS Material Constructed from robust ABS plastic to ensure reliable performance and durability under regular usage. Use Scenarios Living room space heater: select L1 to L3 to maintain comfortable warmth with easy adjustment. Massage equipment or therapy device: switch between levels to match desired intensity or operation mode. Small workshop or DIY project: control a fan or heater to regulate airflow or temperature during tasks.