Feature_x000D_VOLUME ADJUSTMENT: The doorbell has three levels of weak/medium/strong volume adjustables, high volume; a variety of pleasant ringtones can be switched at will._x000D_EASY INSTALLATION: The doorbell can be installed in any position through magnetic installation, non-hole installation, and adhesive backing to meet your different needs._x000D_Applications: It is suitable for home, business shops, stores, hotels, factories, doorway entrance place requiring either guests saluting function._x000D_Multiple Ringtone Options: Offers a variety of ringtone choices or voice messages, allowing you to personalize the sound alert to suit your preferences._x000D_Energy Efficient: Designed to be power-efficient, with low energy consumption, extending battery life or reducing energy costs for long-term use._x000D_Notice:_x000D_Actual color may be slightly different from the image due to different light effect_x000D_Please allow 1-3cm deviation due to manual measurement_x000D_Description:_x000D_Specification: Battery Type/Rechargeable Type_x000D_Battery Type power supply: 3*AA batteries self-provided_x000D_Rechargeable Type battery capacity: 400 mAh_x000D_Audios output power: 0.8-1W_x000D_Audios format: MP3_x000D_Infrared sensing range: 4-6 meters 120 degree viewing angle_x000D_Rechargeable Type: equipped with lithiums battery, USB cable_x000D__x000D_Package List:_x000D_1x Inductive DoorBell Voice Reminder _x000D__x000D_