describe: Sofirn SP35 is a powerful multifunctional EDC flashlight, suitable for indoor and various outdoor activities, such as camping, hiking, fishing or hunting. It uses the new 21700 format and has a USB-C port for easy charging. ing, high-efficiency DTP MCPCB board, ultra-high brightness SST40 LED, up to 2000 lumens, constant current & no; rent control and improved, more stable design. In addition, it uses a complex user in & not; . Interface with step mode and stepless ramp and extended temperature regulation; (ATR) and intelligent thermal control. Specification Including: flashlight*1, with battery Transmitter: 1x Luminus SST-40 5000K Working voltage: 3.0V-4.2V Driver: Constant current step-down driver Battery option: 1x 21700 lithium ion battery Size: 126mm (length) 28mm (head diameter) Weight: 73 grams (without batteries) Flashlight body: aerospace grade 6061 grade aluminum alloy, CNC manufacturing, hard anodized to military grade specification type III, wear-resistant surface to obtain a solid body, collision-resistant geometry and better heat exchange. Tempered mineral glass lens Water resistance is generally IPX-8 (up to 2 meters underwater, no diving) Memory mode: save the last brightness level used in the general mode (economy/low/medium/high) Reverse polarity protection for improper battery installation Low voltage warning: When the battery voltage is too low, the LED indicator in the side switch will start to flash quickly. Please charge the battery. Low voltage protection: The flashlight will automatically step down when the voltage is lower than 3.0V, and it will automatically shut down when the voltage is too low. Please charge the battery. Advanced temperature control (ATR) technology: As the temperature rises, SP35 is programmed to automatically reduce and increase the brightness. These thresholds are set to 45C, 55C, and 65C. The higher the temperature, the more the brightness drops. Once the temperature drops, the brightness will increase again according to the mode you selected. Instructions Group 1: Step mode group (default) To activate from OFF, click. Press and hold to switch the mode step by step (Eco-Low-Medium-High). Click Switch. Double click to activate Turbo mode from OFF or ON. In Turbo mode, just return to the previously used mode and double-click again to start moonlight mode. Group 2: Slope Group The ramp mode allows you to continuously adjust the brightness from moon to turbine level with complete flexibility. To activate from OFF, click. Press and hold to continuously change the brightness ("Ramp"). Ramp & No; When the button is pressed again within 1.5 seconds, the direction will be changed. When it reaches the lower or upper end of the slope, the light will flash once. Click to open it again. Double click to activate the Turbo level from OFF or ON. Click again to return to the previously used brightness level, and double click again to activate the moonlight level. From turning off, keep at moonlight level for 1 second. Switch between group 1 and group 2 From ON 4 quick clicks to cycle between the two mode groups. Strobe mode Three clicks can activate the strobe mode from OFF or ON, and double click again to switch SOS Beacon Strobe cyclically. Electronic lock SP35 has a lock function to prevent accidental activation, such as in a pocket or backpack. 4 quick taps from off to activate the lock. Quickly click 4 times to cancel the lock again. In the locked mode, press and hold the side switch to use the moonlight mode.