EXELAIR by Milton (EX999008) 8-in-1 Digital Tire Gauge Auto Emergency Tool DIGITAL TIRE PRESSURE GAUGE: Measures in PSI (5-100) and BAR readings. TIRE TREAD DEPTH GAUGE: Multi-colored indicator lights (Green- Proper tread, Yellow- Tread wearing down, Red- Tread worn away). 8 MULTI-FUNCTION TOOLS: Emergency glass-breaker hammer, safety seatbelt-cutter, LED flashlight, LED flashing warning light, tire deflator, tire pressure gauge, tire tread depth gauge, magnets to attach to side of vehicle. CAR SAFETY/MAINTENANCE: Optimal auto emergency roadside assistance tool for your car. These make great gifts for those you care about. AUTOMATIC SHUT-OFF: Features a 30-second auto shut-off to save battery life. Batteries included (2 AAA).