About this item

All In One Multifunction Jump Starter: Say goodbye to conventional car battery jump starters. The CYD21 Jump Box delivers a powerful 6000A peak current, capable of starting all 12V vehicles—including cars, SUVs, trucks, motorcycles, ATVs, boats, and even diesel engines up to 12L. Never wait for roadside assistance again.Beyond jump-starting, it integrates multiple functions: a tire inflator with pressure gauge, a portable power bank, fast charging capability, and a 3-mode LED light (flashlight, strobe, and SOS). All in one compact, professional-grade device. Your Ultimate Roadside Companion.
Meet the 160PSI Smart Air Compressor – Your On-Demand Inflation Expert: Go beyond jump-starting. This device integrates a robust air compressor powered by a high-efficiency motor, delivering fast inflation for everything from your car's tires (up to 160PSI) to your motorcycle, e-bike, and even sports gear. With smart digital presets, tire pressure prset and auto shut-off, it takes the guesswork out of inflation, providing perfect results with ultimate safety. The included 4 nozzles make it the ultimate all-in-one portable pump for your vehicle and hobbies.
45W+18W-Fast Charging: Never wait long for power again. Our portable jump starter 45W USB-C Input lets you fully recharge this jump starter in just 1.5 hours—or get enough juice for a start in only 20 minutes. Simultaneously fast-charge your phone and laptop using the dual-output ports (12W/18W). Built with a robust battery that maintains a charge for up to 24 months, it's always ready for an emergency.(Note: 45W wall charger is not included)
Equipped with an ultra-bright 800-lumen LED light: This jump pack for car battery provides illumination that is up to 6-7 times brighter than standard models. It can run continuously for an exceptional 88 hours on a single charge. The light features three distinct modes—Flashlight, Strobe, and SOS—to adapt to any situation, from roadside repairs to emergency signaling. For easy transport and secure storage, the unit comes with a sturdy, human-engineered carrying case.
3.0" Large LCD Display & 10-Point Safety System: Operation is simple and intuitive with the large 3.0-inch LCD screen, which provides at-a-glance readouts for battery level, preset tire value, real-time tire pressure, and inflate mode. Engineered for total peace of mind, this jump starter incorporates 10 essential safety protections—including spark-proof technology and reverse polarity protection—to eliminate risks from incorrect connections and ensure 100% safe operation.