The Wireless Door Bell Battery Operated Chime & Doorbell Push in White by Byron (model DBY-22311) is a modern, rectangular-shaped doorbell that is battery operated. It includes a doorbell receiver and button, both made of plastic. The doorbell features a waterproof design, lighted button, and comes with a melody/tune for added convenience. With a voltage of 4.5V, it is suitable for use in shops, schools, and homes. The chime is portable and has a matt finish, making it a versatile and practical choice for any household or business.
eBay