Product description:
INS-11074 Near Visual Acuity Chart for testing OPTIUSA
Dimensions: 9 x 5 x 1 in / 23 x 12 x 2 cm
Weight: 10.35 oz / 293 g
Specifications:
- LED background chart (double sides)
- Test distance: 30CM
- Input: AC110V~240V, 50/60HZ
- Output: DC5V, 800mAh
- Nokia 3100 battery 800mAh