It is very inconvenient to use traditional clock or watch repair magnifier which needs to be clamped by eyelids and may affect the repair quality of precision instruments. This magnifier can solve this problem to make it easier and more accurate to repair precision instruments. Specifications: Colors: Black Battery：CR1620 3V (not included) Item weight: 55g Package Size: 15.5 * 5 * 5cm Package Weight: 71g Package including: 1 * Glasses Magnifier