acegoo Kinetic Light Switch, Self-powered Transmitter No Wiring No Battery No WiFi Required, Work with Receiver Remote Control house Lighting & Appliances (Switch Only) SELF-POWERED NEED WORK WITH RECEIVER TO REMOTE CONTROL LIGHTS ON/OFF (Receiver Sold Separately) NO BATTERY, NO EXTERNAL POWER REQUIRED - Innovative energy harvesting technology, press switch to produce electricity, switch can place wherever without running wires ADD OR RELOCATE A SWITCH TO LIGHTS WITHOUR PULLING WIRES - No lots of workload to pulls wire to the switch location, quick installation and save labor and material costs EASY CREATE MULTI-LOCATION SWITCHING APPLICATIONS - Simply pair switches with a receiver to set up multi-way switch like 3-way switch for staircase, basement, garage, etc WATER-RESISTANCE SWITCH CAN USED IN WET ENVIRONMENT - Self-powered switch no any externel power connecting, no electric leakage. It works great at wet environment NO SIGNAL INTERFERENCE BETWEEN SWITCHES - Encrypted wireless signal, signal can go through walls, up to 300 feet transmission distance outdoor, 100 feet for indoor use