[Convenient and reliable] This device is ideal for elderly individuals, children, disabled persons, pregnant women, or patients requiring quick assistance. Since caregivers or family members may not always be nearby, simply pressing the button allows users to receive timely and thoughtful care without needing to shout. It can also function as a doorbell. [Long distance] Operates up to 400 meters in open areas; distance may be reduced by walls and other obstacles. Utilizes 16-bit encoding to minimize interference from other devices, ensuring reliable performance throughout the home. [Easy to place] The waterproof transmitter includes a lanyard for wearing as a pendant or placing within easy reach, such as beside the bed. The receiver can be wall-mounted with a cord, placed on a tabletop, or carried in a caregiver’s pocket.