Features:
It is consisted of 32 pieces of LED of high brightness and the average color temperature is 5500k.
More approach natural light use high quality led light.
It could flash or provide the continuous light. 
There are seven levels luminance.
Attached are equipped with 52mm, 55mm, 58mm,62mm, 67mm, 72mm, 77mm, seven different adapter ring.
Fit for macro shot, scientific research, medical and personal hobbies of photography.

WORK FOR: DSLR with standard hot shoe.
for Nikon D7100, D5200, D600, D3200, D800/D800E, D5, D5100, D7000, D3100, D300S, D3000, D3X, D90, D700, Canon EOS 5D Mark III , 5D Mark II, 1Ds Mark [IV / III / II / I ], 1D Mark [III / II N/ II / I]
6D, 5D, 7D, 70D, 60D, 50D, 40D, 30D, 100D, 700D, 650D, 600D, 550D, 500D, 450D, 400D, 350D, 300D, 1100D, 1000D;
for Olympus DSLR E5 E620 E420 E520 E3 E600 E620 E30 E450 E500 E510 E420 E410 E400 E330;
for Panasonic GF6 GH3 G5 GF5 GX1 GF3 G3 GH2 G2 GF2 G1 GF1 G10;
for Pentax DSLR K-30 K-01 K-5 K-7 K-M K-r K20D K-m K10D K100D.

Specifications:
Guide Number: 15GN
Flash Range: 5--150cm
Color Temperature: 5500k
Each flash duration:1/100s
Power: 4 * AA Batteries(not included)
Package size: 16 * 9.5 * 12.5cm / 6.3 * 3.7 * 4.9in
Package weight: 325g / 11.5oz

Package List:   D1690
1 * Macro LED Ring Flash
7 * Adapter Ring (52mm/55mm/58mm/62mm/67mm/72mm/77mm)
1 * User Manual(Chinese & English)