Features: Intelligent sensing doorbell: built-in intelligent chip doorbell, effective sensing distance 4-6meters. Volumes adjustment: large volumes sensing doorbell detects visitors will automatically prompt sound. Weak/medium/strong three level volumes adjustable; A variety of pleasing timbre can be switched at will. Personalized recording: doorbell support global voice recording and broadcasting, long press to open the recording function and input a specific sound. This allows a specific tone to be sounded each for time the doorbell is activated. Easy installation: magnetic installation, tear off the sticker, doorbell can be installed in any position to meet your different needs. Wide applications: the induction doorbell is used in families, apartments, shops, supermarkets, as well as the elderly, patients, pregnant women and so on. This doorbell has 19 Chinese recordings and 1 English recording. You can record and use it according to your own needs. Specifications: Material: Plastic Size: Approx.5.2x3.7x8.5cm/2.04x1.45x3.35in Color: White Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Doorbell Intelligent sensing doorbell: built-in intelligent chip doorbell, effective sensing distance 4-6meters. Volumes adjustment: large volumes sensing doorbell detects visitors will automatically prompt sound. Weak/medium/strong three level volumes adjustable; A variety of pleasing timbre can be switched at will. Personalized recording: doorbell support global voice recording and broadcasting, long press to open the recording function and input a specific sound. This allows a specific tone to be sounded each for time the doorbell is activated. Easy installation: magnetic installation, tear off the sticker, doorbell can be installed in any position to meet your different needs. Wide applications: the induction doorbell is used in families, apartments, shops, supermarkets, as well as the elderly, patients, pregnant women and so on.