1. Wireless, easy installation 2. Long range: 70-110M (open area) 3. High-frequency vibration for strong signal penetration 4. 32 selectable music ringtones 5. LED lights flash with music 6. Multiple styles available **Specs:** - Receiver: 2x AA batteries (not included) - Transmitter: 1x 12V23A battery (included) - Frequency: 315Hz - Receiver power: 3V/50-60Hz, 2W - Transmitter power: 12V/23A - Material: ABS - Features: Self-adhesive, LED flash, 32 ringtones **Highlights:** - 32 adjustable ringtones for pleasant sound - Stylish design to enhance home decor - Wireless setup, no wiring needed - 100M remote range (open area) **Package includes:** 1x Doorbell receiver 1x Doorbell transmitter **Installation notes:** - Avoid metal objects to prevent interference - Use paired transmitter and receiver only - Keep away from direct sunlight and rain - Use quality alkaline batteries, check for leaks regularly