Loud alarm clock measuring 6.5 inches. With a clear display screen and font display, it is able to meet the needs of most scenarios. The vibrating clock itself has 4 alarm modes, namely: Buzz mode, vibration mode, flash light mode and 3 in 1 mode (Vibration+Buzz+Flash light). The first two modes are suitable for reminding in most scenarios, while the third light mode is more suitable for reminding the time in a silent way in scenarios that require silence. The fourth one is the enhancement of the first three modes gathered together, suitable for mainly heavy sleepers or people who can't hear the sound of the alarm clock. The intensity of the loud alarm clock for heavy sleepers adults is divided into two parts: the first is a three-position sound (max 95 dB), and three-position vibration intensity. The alarm clock has four adjustable brightness levels, which allows customers to have different brightness options for different scenarios. The alarm clock also has a snooze mode function, giving people who don't want to get up after the alarm clock rings an adjustable buffer time (1-15min). The alarm clock is also capable of switching between 12/24 hours. The alarm clock also has two alarm settings, which can meet the needs of most people in most scenarios, to ensure that the user will not miss the set time. And the alarm clock is very simple to set up, not complicated.Power failure battery memory function ( not included battery ) Inside the alarm clock package are: Loud Digital Clock, Power Adapter, Power Cable, Bed Shaker, Product Manual 【Loud Alarm Clock for Heavy Sleepers Adults】Designed specifically for heavy sleepers, this Meloya alarm clock features a powerful alarm that is sure to wake even the deepest sleeper. Say goodbye to oversleeping and enjoy a more productive and punctual start to your day. 【6.5" LED Display Screen】With a large and clear 6.5" LED display screen, this alarm clock ensures easy visibility from across the room. No more squinting or straining your eyes to check the time, providing a convenient and hassle-free user experience. 【Independent Dual Alarm Settings with Snooze Function】Perfect for couples and individuals with different wakeup times, this alarm clock allows you to set two separate alarms. Additionally, the snooze function allows for a few extra minutes of sleep before the alarm sounds again. 【Multiple Alarm Modes and Adjustable Brightness】Choose from four different alarm modes to suit your preferences - beep mode, flash reminder mode, vibration reminder mode, or a combination of beep, flash, and vibration. The 4 levels of display brightness adjustment ensure optimal visibility during the day and a dimmer setting for nighttime use. 【Battery Backup and Power Failure Memory Function】Never worry about waking up late due to a power outage. This alarm clock comes with a battery backup feature that ensures it continues to operate even during power failures. Additionally, the power failure memory function retains your alarm settings, so you don't have to reset them every time the power goes out.