Loud Bell: Double bell design, mechanical bell ringing, ringing clear and loud, no fear of not waking up. Silent and Noiseless Silent second-sweep movement, no ticking to ensure a good sleep and best working environment. Night Lamp Function: Press light button, you can see clearly the time at night. Easy to Use: There are just 2 knobs on the back, one to adjust time and one to adjust the alarm. Easy to read dial, perfect for kids or seniors.