Specification
Emitter: 3x cree XHP50.2 with a lifespan of 50,000 hours
Operating voltage: 2.8V – 4.2V

Reflector:Orange relfector
Battery options: 4x 18650 lithium-ion battery with button top
Dimension: 147mm (length) × 76.5mm (head diameter)
Weight: 558 grams (without batteries)
Premium type III aluminum alloy, hard-anodized with anti-abrasive finish
Magnetic rotating ring and handle for convenient one-hand operation
Reverse polarity protection from improper battery installation
Low voltage warning: When the battery voltage is lower than 3.0 Volt, the LEDs will start to flash rapidly once every minute as a reminder to replace the batteries. Please insert recharged batteries in time to avoid any danger while diving.
Low voltage protection: The flashlight turns off automatically if the voltage is lower than 2.8 Volt. Please recharge your batteries.
Advanced Temperature Regulation (ATR) technology: ATR automatically reduces the brightness level when the driver temperature reaches 55°C to prevent overheating

Operation Instructions
SD01PRO uses a magnetic control switch. Rotate the ring to turn the light on/off and to change modes from left to right between Low, Medium, High and Turbo.
Safe Diving Illumination Design
If the detected battery voltage is too low for the High Mode, the output will automatically step down to prolong the flashlight’s runtime.

Choice:

1.No batteries:come with 1 flashlight, 2 replace orings

2.with batteries kit:come with 1 flashlight, 2 replace orings, 4 *18650 battereis,2* USB charger