Battery Operated Doorbell: This wireless doorbell is powered by 3 AAA batteries (included), requiring no electrical outlet. The receiver can be mounted on a wall using screws or placed easily on a desk. It is portable and suitable for use in areas such as the backyard, basement, garage, or bedroom. Wireless Doorbell with Touch Button: The touch button is designed for indoor and outdoor use, featuring IP44-rated dustproof and waterproof protection. It offers high sensitivity and low power consumption for reliable performance. Flashing Light Doorbell: This wireless doorbell includes 36 melodies and 4 volume levels (mute, low, medium, high). A built-in large LED indicator provides visual alerts, offering added assistance for individuals with hearing impairments. Long Operating Range up to 1000 ft: The doorbell delivers a strong wireless signal of up to 1000 feet in open areas, ensuring reliable operation without interference from household devices or neighboring systems. Easy to Install Doorbell: Simply insert 3 AAA batteries into the receiver and attach the transmitter to the door frame (remove the insulating sheet inside to activate). Avoid installing near metal surfaces or electronic devices such as televisions.