Features: Easy to use: The elderly and pregnant women can easily carry this caregiver call bell with its convenient hanging rope design. The large 27mm button allows for one-touch calling, ensuring quick assistance whenever needed. Adjustable volume and ringtone: With a 110dB loud volume and 4 adjustable volume levels, this call bell can be customized to suit individual preferences. It also offers a mute mode for silent operation, allowing for a peaceful environment. Versatile and personalized: With over 60 pre-set ringtones, this call bell provides a wide range of options to choose from, so that you can easily identify the caller. Long-range effectiveness: This call bell has an effective range of 20-40 meters even through walls, ensuring that the call for help is heard from anywhere in the house. You can feel confident knowing that assistance is just a button press away. Durable and reliable: Made with high-quality materials, this call bell is built to last. Its sturdy construction ensures durability, and its reliable performance guarantees that it will be there whenever you need it. Specifications: Battery: 12V 23A battery Signal Frequency: 433MHz RF Max Volume: 110 dB (4 gears adjustable) Voltage: AC110V220V Suitable Temperature: -10C to 50C Material: PC Button Part: 7.2 x 4.5 x 1.8 cm Speaker Part: 9.3 x 5.8 x 2.8 cm Package Size: Approx. 11.6 x 11.6 x 8.6 cm Package Weight: Approx. 150g Package List: 1 x Set of Call Bell (1 button, 1 speaker)