Supports recording and can record personalized prompts The volume is adjustable, three levels of volume can be switched freely 20 pieces of music Infrared human body sensing, automatically broadcasts voice in the sensing area, and the sensing distance can reach about 3 meters. Anti-theft at night, you can adjust the alarm sound;Single-click the recording button to announce the "recording mode". Press and hold the recording button to realize the recording function. Release the recording button to end the recording. After the recording ends, the recorded voice will be played automatically once; in recording mode, the recorded voice will be played time the infrared sensor is used. If the recording again covers the previous recording, it can be recorded and played as desired according to the customer's needs. The maximum recording time is 20 seconds. Record again after power outage. for Clothing store | Supermarket | Pharmacy | Convenience store | Front desk | Restaurant Magnetic Patch Both the side and the back can be magnetically sucked for easy placement Large Volume Port 3-Level volume can be adjusted, wide coverage USB Power Supply batter:500mah Rechargeable:Charge once available for 3-5 months Battery type: a set of batteries can be used for 1-2 months (The data is provided by the factory laboratory and is for reference only) Colour:White Material:ABS Package Contents: 1 * wireless sensor doorbell 1 * data cable 1 * magnetic patch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.