1) 2 different flashing modes: glow and flicker 2) 2 different heights: short (D37 x H23) and tall (D37 x H34) 3) LED color available in red, yellow, blue, jade, 7-color 4) Red and yellow works with 1 x CR2032 lithium battery; blue, jade, 7-color works with 2 x CR2016 lithium batteries 5) Price list in details for your requests