This stylish 2 gang black switch from Ener-J's Eco Range runs solely on kinetic energy meaning no batteries or power supply are required. This product can be mounted anywhere including bathrooms shower rooms and outside as it has an IP67 rating making it waterproof and dustproof. An Ener-J receiver (not included) can be connected with up to 10 switches. This is an ultra-low power design with a life of up to 50 years. This product is sold with a 2 year warranty.