This wireless type requires no wiring, making it easy to install for home care, store registers, reception desks, and other call systems. Ideal for calls and notifications in homes, stores, and offices. Approximately 2-year battery life. Please note that item 12 listed in the instruction manual is not included, along with the batteries. - Model: PWC-100 - Battery Life: Approximately 2 years Receiver: Uses 2 x AA batteries Transmitter: Uses 1 x CR2032 battery - Applications: Home care and calling from store registers Thank you for viewing.