HuaYang Car Truck SUV Driving Driver Keep Awake Safe Anti Sleep Doze Nap Drowsy Alarm Blue Features: Anti Sleep, Keep Awake, Drowsy Alarm Material: Plastic; Size: 7*4.5*1.4cm (Approx.) Color: Blue Powered by 2 AG13X3 button cell batteries(included). Package includes: 1 x Anti-sleep Alarm