Panasonic Expandable KX-TGF345B Cordless Phone with Answering Machine - 5 Handsets Block up to 250 numbers with one-touch Call Block on base unit and handsets Check messages, return calls and more with a Smart Function Key button Clearly hear calls from noisy places with Noise Reduction Receive alerts when the baby starts crying with built-in baby monitor Stay connected when the power goes out with battery power backup Use rechargeable Ni-MH batteries (Alkaline/Manganese/Ni-Cd batteries Cannot be used), Two AAA-size rechargeable Ni-MH batteries not included