Enhance underwater safety and team communication with the XTAR SD2 4-Colour Dive Beacon. Engineered as a high-visibility, multi-functional signaling light, the SD2 delivers up to 100 lumens of brightness across 4 vivid LED colours and 9 distinct signaling modes. Whether you need team identification during night dives, clear positioning in low-visibility environments, or emergency signaling at depth, the XTAR SD2 provides flexible performance packed into a ultra-compact, durable body. 

Key Features

• 4 Light Colours & 9 Signal Modes: Switch between multiple colour outputs and flashing sequences to effortlessly communicate status, role, or position to dive buddies. 
• Dual Power Versatility: Compatible with a single standard AA battery or a rechargeable 14500 Li-ion battery, making spare power easy to source anywhere in the world. 
• 100m Submersible Rating: Built for demanding dive conditions with an IPX8 waterproof rating down to 100 metres (328 feet). 
• Intelligent Rotary Control: Simple rotary head twist interface allows seamless operation and mode switching even while wearing thick dive gloves. 
• Built-in Mode Memory: Automatically defaults to your last used setting after being powered off for more than 5 seconds. 
• Low-Battery Warning & Extended Runtime: Provides up to 7+ hours of continuous runtime (varies by battery and mode) with an automatic dimming feature to alert you when battery levels run low. 
• Lightweight & Streamlined: Weighing just 58g (without battery), it clips effortlessly to BCDs, tanks, or lanyards without drag. 

Included

•  XTAR SD2 Beacon
• 14500 USB-C Rechargeable Battery
• USB-C Charging Cable
• Carabiner Clip
• Tail Lanyard
• Spare O-Rings
• User Manual 

Technical Specifications

• Maximum Output Up to 100 Lumens (White - 100 Lumens, Blue - 20 Lumens, Red - 30 Lumens, Green - 60 Lumens
• Max Depth Rating 100 Meters / IPX8 Waterproof 
• Colours & Modes 4 Colours (RGBW), 9 Signaling Modes 
• Battery Compatibility 1x 14500 Li-ion or 1x AA Battery Max Runtime 3.3hrs constant, 7 Hours flashing (14500 Li-ion) 
• Body Material Aircraft-grade Aluminum Alloy 
• Dimensions 108 mm (Length) x 25 mm (Diameter) Weight 58 g (excluding battery)