Attention: Welcome to my shop! We ship the product from China, the delivery time is 7-14 days!Features:1. No wiring required, easy installation2. Long distance, open up to 70-110M3. High-frequency vibration body, strong penetrating ability4.32 music ringtones optional5. When the music is playing, the LED lights will flash at the same time.6. A variety of styles to choose from.Product name: oscillator wireless flashing light doorbellProduct Specifications:Receiver: 2 AA batteries (Not included)Transmitter: 1 12V23A battery (included)Frequency: 315HzUsage: After installing the battery, pull the switch of the receiver to the sound selection (double arrow) position (each time you press the launch, a ringtone will be changed. If you want to fix a certain piece of music, pull the switch to the fixed sound position (music symbol) can be fixedPrecautions 1, When installing the doorbell, it should not be close to metal objects, so as not to affect the use of the doorbell by the metal magnetic field;2, The button and the doorbell are paired with the same frequency code, and cannot be operated with non-paired buttons;3, Do not install the doorbell or button in a place exposed to sunlight and rain;4, Try to use high-quality alkaline batteries, and regularly check whether the battery leaks and corrodes the circuit board Note: 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.