Easy-to-use base unit features three 1-touch dial buttons and battery backup; Block up to 250 numbers with 1-touch call block on base unit and handsets; Clearly hear calls from noisy places with noise reduction; Receive alerts when a baby starts crying with built-in baby monitor; Enjoy up to 13 hours of talk time and key detector compatibility; Includes base unit, 2 cordless handsets, and 2 AAA batteries;