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