Item Name: Wireless Doorbell Decibel: ≤70 Ringtones: 36 Chimes Service Life: More Than 1 Year Transmitter Battery Capacity: 800mAh (Included) Receiver Voltage: DC 3V Color: White Features: High Sensitivity, Low Power Consumption, Strong Penetrating Receiving Distance: 100m Power: 0.5W The Farthest Transmitting Distance: 100m Volume Levels: 3 Volume Levels Transmitter Voltage: 12V Receiver Power Supply: 2 x AAA Batteries (Not Included) Material : ABS Manual : no Size Details: Size: 9.5cm x 5.6cm x 2.5cm Specifications: The length of the product is 9.5cm, the width is 5.6cm, and the thickness is 2.5cm. Made of high quality ABS material, it is durable. Since it is designed with LED flash and music synchronization, it brings more convenience for people who are of weaker hearing. Featuring no wire design, it is easy to install. What brings strong penetration and far receiving range is the high frequency vibrator design. You can adjust as you like because it has 36 melodies and 3 volume levels. Wireless doorbell is not only suitable for home, but also for passageways, restaurants, stores, hotels and other larger commercial spaces. Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Receiver 1 x Transmitter 1 x Battery