Description: 36 melodies and 3 volume levels design makes you can adjust as you like. High frequency vibrator design brings strong penetration and far receiving range. No wire design makes it easy to install. LED flash and music synchronization design brings more convenience for people who are of weaker hearing. Made of high quality ABS material, it is durable. The length of the product is 9.5cm, the width is 5.6cm, and the thickness is 2.5cm. Wireless doorbell is not only suitable for home, but also for passageways, restaurants, stores, hotels and other larger commercial spaces. Item Name: Wireless Doorbell Material: ABS Color: White Power: 0.5W Decibel: 70 Ringtones: 36 Chimes Receiver Voltage: DC 3V Transmitter Voltage: 12V Receiving Distance: 100m Service Life: More Than 1 Year Volume Levels: 3 Volume Levels The Farthest Transmitting Distance: 100m Transmitter Battery Capacity: 800mAh (Included) Receiver Power Supply: 2 x AAA Batteries (Not Included) Features: High Sensitivity, Low Power Consumption, Strong Penetrating Size Details: Size: 9.5cm x 5.6cm x 2.5cm/3.74" x 2.2" x 0.98" (Approx.) 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