Material: Acrylonitrile Butadiene Styrene, Metal, Acrylic optical lens.
Size: 200mm x 95mm x 170mm
Magnification: 3 times(Great lens),4.5 times(Small lens)
Lens Diameter: 75mm(big), 20mm(small)
Power by Battery: 3 AAA Batteries(not included), also can powered by usb cable
1 x LED Clip Type Helping Hand Magnifier 3x 4.5x
1 x USB Cable
Product is very useful for students or amateur hobbiests. I ordered it for my son and it will be very helpful. Plastic quality is above average, Metal parts and screws are a bit challenging but very easy to use and install. Loop is more than expected. There is a small cylinder inside the crock necks. You need to squeeze it with pliers in order to hold it properly. Spring for Solder iron does the jow without any hassle.