Strong, pulsating vibrations, Vibration or buzzer alarm (switchable) * Both audible and vibrating alarms offer a duration of four minutes, Audible alarm features an escalating volume * Bright strobe light is featured in the following alarm options: Audible alarm/bright strobe light/vibrating alarm * Audible alarm/bright strobe light, 24-hour LED display with push-button illumination * Protective cover for controls -- can also be used as a stand