Doorbell RGB lights flashing can help people with hearing impaired. 1x battery CR2032, Double-sided adhesive tapes, Screws and 1x user manual. IP65 Waterproof & Durable: IP65 Door Bells Wireless Cordless can withstand the harshest weather (-4 °F to 140 °F), regardless of scorching heat, heavy rain, or snowstorms.
eBay