Safe Driving Wake-Up Alarmer shoe cover Sleeve length: 28CM

Sleeve length: 28CM

ADJUSTABLE FIT ONE SIZE - Fits most

Changing the dirction of the train by adjusting the chimney

【Attention】-powered by 3x aaa battery (not included)

Safe Driving Wake-Up Alarmer shoe cover Sleeve length: 28CMFEATURES Wake Up Alarmer for Driving Safety For driver safety, non sleep is the best choice! Electronic balance principle Loud but not harsh sound Perfectly fit your ear shape Universal LR44 batteries for 6 12 months endurance Suitable for students, drivers, office workers, etc. HOW TO USE Wear it on the right ear properly as illustrated. Turn on the switch. Examine whether it is in normal operation: it beeps when you are leaning your head forward and