Product Description Know your Toddler Baby is Leaving Room At Night · 14 ringtones and 1 family request help ringtone · 4 level volume (include mute mode) · Different sensor with different ringtones · Female voice prompt operation · Easy to install and operate kids room alarm Front/Backyard Door Additional Sensor Giveaway Kids bedroom alarm No tools are needed! Please lean the vibration sensor against the bottom of the bedroom door at 45 degrees after your kid's sleep. But doesn't stick to the door. The sensor drops alert when the door opened. Let you know your kid is leaving the room at night. Front/Backyard Door Attach the door sensor on the frame of the front/backyard door and be notified if your toddler leaving your house. Stuff Movement Alert Attach the vibration sensor to stuff that you don`t want your kids to move. The sensor alert 100% if your kids move the stuff Stuff Movement Alert Caregiver Pager door sensor Caregiver Pager for expectant mother Switch to the SOS call button; keep pressing the middle button of the vibration sensor for a few seconds until LED lights. You can simply press one key to deliver an alert message to the host Hint: Switch back to vibration mode; keep pressing the middle button again for a few seconds until the LED off. Communication Distance 250 feet communication range open area Door Sensor CR2032 3V lithium battery included. Power switch. Please open the back cover and switch it on. LED indicator lights up when it opened. And LED blinks in case of low battery. Transmitting distance: