XTAR SD2 Diving Blinker (Set) with 4 in 1 Colour
SKU: XTAR-SD2
| Specification | Details |
| Model | SD2 |
| Light Colors | White, Red, Blue, Green |
| Waterproof Rating | IPX8 (100m underwater) |
| Impact Resistance | 1.5m |
| Battery | 1× protected 14500 Li-ion battery / 1× AA battery |
| Housing Material | Aluminum Alloy (AL) |
| Storage Temp. | 0℃ ~ 40℃ |
| Dimensions | 108mm (Length) × Φ25mm (Tube) |
| Net Weight | 58g (without battery) |
Output & Runtime by Mode
| Color | Mode | Output | Runtime (14500 1200mAh) |
| White | Constant | 100 lm | 3.3 hrs |
| White | Flash | — | 7.4 hrs |
| White | Strobe | — | 7 hrs |
| Red | Constant | 30 lm | 3.3 hrs |
| Red | Flash | — | 7.4 hrs |
| Blue | Constant | 20 lm | 3.3 hrs |
| Blue | Flash | — | 7.2 hrs |
| Green | Constant | 60 lm | 3.3 hrs |
| Green | Flash | — | 7 hrs |
SD2 4-Color Dive Beacon

Quick Specs at a Glance
- 100 Lumens Max Output
- 7H+ Runtime
- 9 Modes (4 Light Colors)
4 Colors for Versatile Signaling
Equipped with 4 light colors and 9 signal modes, the SD2 delivers flexible signaling support for different underwater environments.
14500 / AA Dual Compatibility
Supports either one 14500 battery or one AA battery for convenient replacement with easy-to-find power options wherever you go.
Bright Signals at a Glance
Up to 100 lumens keeps signals clear and visible underwater for easier recognition.
Long Runtime That Stays Reliable
With over 7 hours of runtime, it delivers reliable support for full dive sessions and extended underwater signaling use.
*Runtime data is based on tests using an XTAR 14500 1200mAh Li-ion battery.
Twist to Control, Easy to Use
Rotate the body to power on or off and switch modes with ease.
- Power On/Off: After installing the battery, tighten the head to turn the signal light on; loosen the head to turn it off.
- Change Modes: After the signal light is turned on, quickly loosen and retighten the head to switch light modes.
Mode Memory Function
After being off for more than 5 seconds, it automatically restores the last used light mode, making every use more convenient.
Automatic Low Battery Alert
When battery power runs low, the signal light automatically dims to alert you, making it easier to monitor battery status and prepare for replacement.
Durability You Can Count On
Backed by 100-meter waterproof protection and an aircraft-grade aluminum alloy housing, it resists drops and corrosion with ease in demanding underwater environments.
Lightweight and Easy to Carry
Weighing only 58g, it can be easily mounted to a BCD, tank, wetsuit, and more for lightweight carry with almost no added burden.
Ready for More Adventures
Suitable for underwater signaling and a variety of outdoor activities, ready for more adventures anytime.