【Emergency Call Button】 This call button is designed for the elderly and people with disabilities to seek help in emergencies and save rescue time. It's an emergency call bell that allows you to send an SOS signal to caregivers/family by pressing the call button when you need assistance. Ideal for the elderly, pregnant women, and patients. 【Easy to Use】 Simply press the button and the receiver will sound. You can choose from 38 melodies, and the volume can be adjusted in 4 levels from 25dB to 110dB as needed. Children and the elderly can also use it. It can satisfy various environments and requirements. 【Easy & Expandable】 When the button is pressed, the LED on the front of the receiver lights up blue while the call music plays, notifying you with sound and light. It can be installed without construction, making it very easy. Also, you can add as many transmitters and receivers as you like. 【Stable Signal & Energy Saving & Waterproof Design】 The battery-powered transmitter has an energy-saving design, allowing for continuous use. It uses a high-sensitivity receiver and can receive up to 300m without obstacles. It also has IP68 waterproof and splash-proof specifications, providing excellent waterproof and dustproof performance. (Note: Do not submerge in water.) 【Package & Quality Assurance】 Includes 2 transmitters, 1 receiver, screws + tape, and 1 Japanese instruction manual. If you have any problems (damage, scratches, dirt, etc.) after receiving the product, please feel free to contact us.