Wireless 2 Gang Switch (Black Finish), Installation-Easy, Battery-Free Wall On/Off Switch Outdoor Waterproof IP67 Wireless Kinetic Switch for Lamp Electric Appliance. (Receiver Needs to be purchased separately)

Features: 

• Self-supply and dimmable: The non dimmer/dimmer switch requires no batteries and no power connection. The energy is built up kinetically by pressing the switch. Small structure and can be used as non dimmable as well as dimmable. Through long press to circularly dim the brightness to suit any activity. Turn on the light again, and it maintains the last light intensity. With this ENER-J light switch, you don’t need to pay the extra money to buy a dimmer.
• Multiple light switches connectable: A receiver (not included) can be connected with up to 10 switches. This allows you to operate a light source with multiple switches. Quite simply as additional switches to existing light switches. Stepless dimming function and storage brightness.
• Range and Usage: The effective range between transmitter and receiver (not included in the package) is
  Up to 20 meters Indoors and up to 80 meters outdoors. ENER-J receiver (not included in the package) can connect to multiple ENER-J switches. Ideal to control your garden house, outdoor lighting from the comfort of the house!
• Never route power cables, ready for use: No slots knocking, no junction box required. Wireless use without drilling and screws. Can be mounted with adhesive tape or simply screwed on. Ready for use within a few minutes. The radio switch allows you to mount in all places. For example, Glue in glass, marble, wood, metal surface or traditional with screw.
• Long life and warranty: Ultra-low-power design. Useful life up to 50 years and up to 200,000 keystrokes. Comes with 2 years warranty