Features:<br> <br> 2 models for option: HS-OP10S/ HS-OP10. The differences between them: HS-OP10S has simple handle. HS-OP10 has standard handle that is more handy and convenient; and adopts coaxial parallel light principle.<br> <br> 5 different apertures. 19 kinds of adjustable corrective lenses; range of lenses: -20D~+20D.<br> <br> 4000K color temperature LED bulb and XHL Xenon Halogen bulb for choosing.<br> <br> The clip with integrated on/ off switch for simple use.<br> <br> Powered by 2 AA batteries (not included), easy to install and replace batteries.<br> <br> Compact size and lightweight design for easy storage and convenient transport.<br> <br> Elaborate design and reliable quality. A classic instrument for physician.<br> <br> <br> Note: Please read the user manual carefully before use.<br> <br> <br> Specifications:<br> <br> Model: HS-OP10S/ HS-OP10 (Optional)<br> <br> Main Color: Black<br> <br> Main Material: ABS<br> <br> Illumination: Direct Illumination<br> <br> Luminance: 14 Lumen<br> <br> Bulb: 106 2.5V, 0.5A; 206 3.0V, 0.08A<br> <br> Power Supply: 2 * AA Battery (Not Included)<br> <br> Operation: Temperature 10~35, Humidity 30%-70%, Air Pressure 700hPa-1060hPa<br> <br> Storage & Transport: -20~70, Humidity 10%-90% (without condensation), Air Pressure 500hPa-1060hPa<br> <br> Item Size: Approx.<br> <br> 173 * 18mm / 6.81 * 0.71in (HS-OP10S)<br> <br> 170 * 20mm / 6.69 * 0.79in (HS-OP10)<br> <br> Item Weight: Approx.<br> <br> 63g / 2.21oz (HS-OP10S)<br> <br> 75g / 2.63oz (HS-OP10)<br> <br> Package Size: Approx.<br> <br> 19.2 * 10 * 3.7cm / 7.56 * 3.94 * 1.46in (HS-OP10S)<br> <br> 19 * 11 * 4.2cm / 7.48 * 4.33 * 1.65in (HS-OP10)<br> <br> Package Weight: Approx.<br> <br> 187g / 6.59oz (HS-OP10S)<br> <br> 294g / 10.38oz (HS-OP10)<br> <br> <br> Package List:<br> <br> 1 * Direct Ophthalmoscope