The Mini B300 is a miniature floating personal locator beacon (PLB) that transmits on 121.5. It has a user replaceable battery that has a 10 year life. Meets the rules for satellite detection (COSPAS-SARSAT).

• In-line speaker emits audio warble to confirm activation and transmission of distress signal or to notify of accidental activation.
• Exclusive ACR audio indication of transmission allows effective self-test
• New, durable, stainless steel antenna is automatically unfolded via quick-release antenna trigger
• User-replaceable battery (Duracell DL223A or equivalent)
• Frequency stability exceeds ETS 300 152 standard
• Floats if dropped overboard
• 121.5 MHz (SAR frequency) provides rescue forces with pinpoint homing
• Compact size with antenna folded; durable double-braided antenna resists distortion when packed for extended periods
• Multiple lanyards allow many secure methods of attachment
• LED indicator confirms transmission
• Diamond knurling on case improves fit and security of grip
• Battery installation instructions included
• Operating life: 24 hours @ -20°C (-4°F)
  
  Size: 12.7 x 7.4 x 4.1 cm (5.0 x 2.9 x 1.6 in)
  Weight: 215 g (7.6 oz)