Features: * Preset 10 tracks in both Chinese and English for option. Voices in different languages can also be customized according to users' needs.? * Automatic infrared induction, will automatically broadcast voice in the induction area with 3-4m induction range.? * Support recording function, allowing you to record what you need at will with a recording time of up to 20s. * MP3 format delivers beautiful and clear sound. Three-level volume can be switched freely for wider coverage.? * Come with a sticker, simple to install, no need to drill. Stick it directly on the wall or door, fast and convenient. * Two power supply ways optional. It can be powered by 3 * AAA batteries (not included) or via USB charging.? * Compact and lightweight body, can be widely used in shopping mall, home, office, shop, store and other public places.? Note:? * 3*AAA dry batteries are not included. You can buy them separately, or power the device directly via USB cable. Please DO NOT use USB charging as power supply after installing the dry batteries.? * Please read the user manual carefully before using this product. * There may be 1-3mm errors due to manual measurement.? Specifications: Material: PP+Electronic Components Color: White? Audio Format: MP3 Code Rate: 8-320kbps? Infrared Induction Range: less than 4m (120 degrees perspective) Battery: 3 * AAA batteries (NOT included) Item Size: 8.5 * 5.25 * 3.73cm / 3.35 * 2.07 * 1.47in Item Weight: 73g / 2.57oz Package Size: 12 * 6.7 * 4.7cm / 4.72 * 2.64 * 1.85in Package Weight: 110g / 3.88oz Package List: 1 * Voice Reminder? 1 * USB Charging Cable? 1 * Back (Side) Sticker? 1 * User Manual