Anti-hack encrypted technology2.4GHz FHSS technology protects your home from being hacked, which is safer than wifi cameras. BOIFUN baby video monitor signal can reach up to 300M distance. When we check this device from upstairs to downstairs, from room to garden, the monitor always receive a strong signal from the camera. | Certificated Safe BatteryCertificated battery can give you a safer and longer using time, which lasts about 15 hours on a single charge in Sleep mode. Sleep Mode: screen keeps off when baby sleeps peacefully, and screen turns itself on when baby cries. | 4 Channels, 4 CamerasBOIFUN baby monitor supports up to 4 cameras on one screen at the same time. Get panoramic view of the room by adding 4 cameras in alternate screen mode. Only one is included in package. |