Silent Vibrating Alarm Clock with Multiple Functions for Hearing-impaired People 1. Time (single press the "SNZ" button to turn on the backlight, no operation within 10 seconds will turn off the backlight) 2. 1224 hour display switching 3. Two sets of alarm clocks: alarm clock one defaults to AM6:00; alarm clock two defaults to AM7:00 4. Snooze function, vibration alarm: three levels of intensity adjustable 5. Low battery reminder 6. Child lock function: In the time display mode, press and hold the "SNZ" button for 3 seconds to enter the child lock mode, and the screen will display LOC. In the child lock state, press and hold the "SNZ" button for 3 seconds to release the child lock mode. When released, the screen will Flashes once. In child lock mode, you can short press the "SNZ" key to check the time, and operating other keys will have no effect. The display sequence is: "LOC" for 1 second (prompts that the clock is currently in the child lock state), and then displays the time. 7. Powered by a built-in 1200mAh lithium-ion battery, which can be charged using a 5V 2A adapter through the TYPE-C hole 8. During charging, the red indicator light lights up, and when fully charged, the green indicator light lights up. 9. Tip: Please do not charge when using the alarm clock to vibrate to avoid damage to the charging hole caused by vibration. 10. Weight: 134g 11. Size: 105x93x33.7mm