SOLAS‑approved, water‑activated LED strobe for lifejackets and survival suits, designed for personal marine safety and rapid location in low light.

• Model 3971.3 - ACR FireFly PRO Waterbug
• Dimensions: 24.13 × 14.73 × 3.3 cm (9.5 × 5.8 × 1.3 in)
• Weight: 68.04 g (2.4 oz)
• Power: one replaceable battery (battery not included). See manufacturer ACR Electronics for exact battery type and replacement instructions.
• Water activation - automatic start on contact with water
• SOLAS‑approved; complies with maritime survival equipment standards
• 360° visibility and high‑intensity LED strobe for improved detection at night
• Compact and lightweight for use with lifejackets and survival suits