In life-or-death rescue operations, you deserve a strobe that never quits. The ACR Firefly Pro LED Strobe sets a new standard for visibility, durability, and reliability, delivering the cutting-edge features rescuers rely on when every second counts..

• 360° wide-emission LED with a 41 candela output creates a full-sphere light beam that’s visible well beyond 3 miles (over 3.5 miles in practice), helping locating responders from a distance.
• Three activation modes—Strobe, SOS, and Steady-On—let you switch from distant signaling to close-up operational illumination with a simple toggle.
• Ultra-clear, cool white light without yellow tinting for maximum contrast and longer-range visibility.
• Long-lasting power—strobe mode runs for over 56 hours, steady-on for up to 28 hours on a single AA battery set, exceeding typical runtimes and meeting demanding standards.
• Compact, rugged design with a military-spec polycarbonate housing that withstands harsh environments and years of use.
• Easy mounting and access—two integral lashing loops and a Velcro strap keep the Firefly Pro securely attached to life jackets, belts, or packs for instant access.
• Waterproof and ready for duty—factory tested to 10 meters (33 ft) of depth, built to function in wet and challenging conditions.

Designed for reliability in critical moments, the Firefly Pro uses two AA alkaline or 1.5V lithium batteries (not included) and features a large ribbed sliding switch for one-handed operation, even with gloves or cold hands. The device is built from tough, flexible polycarbonate and is engineered to maximize output and runtime. With a compact footprint (4.4 x 2.2 x 1.2 inches) and a light weight of 2.39 oz (68 g) without batteries, it rides discreetly in a life jacket pocket or on a belt, ready to shine when you need it most.

Specifications

• Product Number: 3970.4
• Size: 4.4 x 2.2 x 1.2 inches (11.7 x 5.7 x 2.8 cm)
• Weight: 2.39 oz (68 g) without batteries
• Lamp: LED — cool white
• Strobe Intensity: 26.8 candela minimum
• Strobe Visibility: Over 3.2 miles (subject to conditions)
• Strobe Rate: ~60 flashes per minute
• Operation Time: Strobe >56 hours; Steady-On >28 hours (with two AA batteries)
• Power: Two AA alkaline or 1.5V lithium batteries (not included)
• Waterproof: Factory tested to 33 ft (10 m)
• Certifications: SOLAS - Pending, USCG - Pending, IMO LSA

Whether you’re signaling Search and Rescue from a distance, conducting a close-up recovery, or securing your gear for a mission, the Firefly Pro is the reliable, high-performance choice built to save lives.