Specifications: Name Sofirn BLF LT1 8x LH351D Super Bright Camping Light Emitters 8 x LH351D (4 x 5000K 90CRI + 4 x 2700K 90CRI). Color temperature 2700K to 5000 K Luminous Fluxca. 600 lm Firmware Andril UI, distributed under the terms ofthe GPL v 3. The source code is available from http://tiny.cc/TKAnduril Batteries 4xbutton-top 18650 (Not included). Max. length 70mm. Charging Integrated DC/DC buck charger via USB (Universal Serial Bus)-CDriver 5 x 7135 constant current integrated circuits. Low parasitic drain while LT1 is powered off. Body Aluminum with HA III anodizing Switch Electronic side switch Ingress rating Equivalent to IPX7 Weight 405g without batteries Size 68 mmx 176 mm (Head diameterx Lngth) User interfaces:- By default the LT1 is set to use the SMOOTH RAMPING mode.- STEPPED RAMPING mode is available if you prefer discrete brightness steps.- MUGGLE mode simplifies the LT1s UIfeatures to just on/off & smooth ramping. MUGGLE mode also reduces the maximum output level produced by the LT1 to reduce self heating.- Electronic LOCKOUT mode keeps the LT1 from being turned on accidentally. LOCKOUT mode also provides a momentary low light when the button is pushed. Other functions:- Battery check, sunset, beacon, tactical strobe, party strobe, bike flasher, candlelight, lightning storm. See the UI Diagram & the following sections for more details of the features & customizations. Package included:1 x Sofirn BLF LT1 8x LH351D Super Bright Camping Light 2 x Spare Waterproof Orings 1 x Spare Switch Cap 1 x Manual