Easy-to-use wireless call system with a red button. - Set includes: Wireless call button, receiver, strap, AA batteries, instruction manual - Button color: Red - Receiver color: White - Battery type: AA batteries - Features: Easy-to-use wireless call system Thank you for viewing. This is the DAYTECH calling bell, a care pocket bell, wireless call button alarm system, a nurse call system for home use, an SOS call button for patients, pregnant women, and the disabled, a wireless and waterproof design for the elderly [1 transmitter + 1 battery-powered receiver]. Batteries are included.