All the basic stuff:
Price: $39.89. delivered.
(http://www.aliexpress.com/fm-store/406692/211019874-449699568/Eotech-Style-Clone-XPS-3-Holographic-Red-Dot-Sight-Red-and-Green-Illumination.html)
Battery: 1 x CR123 battery
Weight: Approximately 350g or so
Colours/Brightness: Red or Green Dot.
The sight comes packaged in a black cardboard box, includes micro fiber cleaning cloth, battery and allen wrench.
Red or Green Cross hair with drop Compensation Dots
Objective diameter(mm): 22x33
Exit pupil(mm): 22-23
Eye relief: free
Field of view(@100YD): 57'
Easy to adjust and works
I got two clone, one is XPS 3 Holographic Red Dot Sight, Red and Green Illumination, another 552, both less than $40.00, free shipping from China
Both quite nice compared the price.