LIFE TIME GURANANTEE-Digital Tire Air Pressure Gauge -Keychain Hookable-Tpmc- LED Screen-For Cars, Trucks, Motorcycles and Bike-4 Ranges ACCURATE READINGS -Read your tire pressure in PSI BAR KPA to ensure accurate pressure. USE IN DAY OR NIGHT - LCD lighted screen and nozzle allow you to check the tire pressure in seconds SAVE MONEY - Use regularly to monitor tire pressure to extend tire life, improve fuel efficiency and SIMPLE TO OPERATE - Switch easily through modes and power unit on/off with a straightforward one but SATISFACTION GUARANTEE: If you are not satisfied for any reason, simply return it for a full refund.