Range : 10 to 1,990 Lux Resolution : 10 Lux Accuracy : ±8% full scale Battery : 4 x 1.5V button cell (Alkaline A76 or equivalent) Battery Life : Approximately 100 hours (continuous use) Auto Shut-Off : Approx. 15 minutes Operating Temperature : 0° to 50°C Size (L x W x H) : 170 x 32 x 15mm Weight : Approximately 50gm