1.Sound and light synchronization alarm.2.Multiple allarm tones can be selected. 3.The tube is made of HP chip light-emitting diodes and has aservice llife of more than 10o,0o0 hours. 4.The lampshade is made of PC material , which has particularlygood impact strength, thermal stability and gloss. 5.Dedicated integrated chip design,strong electromagneticanti-interference ability.