Specification 1. Accuracy:±(4 % FS+2dgt)FS:full scale 2. Response wavelength:(1000nm-1700nm) 3. Measure range:0-19999 W/m2 4. Size:125mm*68mm*22mm(L*W*H) 5. Weigh:about 110g 6. 9V alkaline battery,6F22