1. Detachable head, easy to install batteries 2. The barrel is equipped with a scale and pupil size comparison chart 3. With pen clip, can be clipped in the pocket, collar and other places, easy to carry 4. Lightweight design, easy to use 5. Bright light, power saving, environmental protection, durable 6. Alloy button switch at the end, easy to operate. 7. Battery spring contact, using physical reverse technology, to prevent oxidation / poor contact and other phenomena 8. Material: aluminum alloy, resin 9. Power supply: 2 AAA batteries (not included) 10. Size: about 13.8 x 1.3cm 11. Weight: about 18.4g
1. 灯头可拆卸,方便安装电池 2. 筒身带刻度尺和瞳孔大小对照图 3. 带笔夹,可夹在口袋、领口等地方,方便携带 4. 轻量化设计,使用便捷 5. 光线明亮,省电环保,经久耐用 6. 尾部合金按钮开关,操作便捷 7. 电池弹簧触点,采用物理反接技术,防止氧化/接触不良等现象 8. 材质: 铝合金、树脂 9. 电源:2节AAA电池(不含) 10. 尺寸:约13.8 x 1.3cm 11. 重量:约18.4g
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