This clock is designed for anyone who has difficulty waking up or cannot hear an ordinary alarm, including those with mild to severe hearing loss. It has a loud buzzer with an adjustable volume and tone control to suit your hearing needs as well as a super-bright 1.8" clock display. An included strong bedshaker will awaken even the deepest sleeper. It also flashes a connected lamp to awaken you. Comes with a security timer that allows you to pre-set the connected lamp to turn on at random times while you are away for added security. Backup battery (9 volt battery not included) can keep the time in case of a power outage. Audio alarm is 85+dB.