We did a market survey before we start this project.It took us 2 months.1. Flashlight   we just use car jump starter onceor twice a year. so we add outdoor flashlight on it. Max distanceof flash is 300m, for a SOS sign.2. Water-proof. 3 level practical waterproof.3. Size torch appearence, mini car jump starter, hand holdeasy.4. Current 500A peak current, 11100mAH battery with 45Cdischarge rate.5. Price  Most selling model cost price in China arearound $35 to $40. retail price in USA is around $80.