DETAILED DESCRIPTION:Streak Retinoscope:Usage and Features:* The filament can be 360° rotated and move upward and downward.* Quickly and precisely measure the astigmatism axis.* The light can be converged, radiated and paralleled.* Continuously adjustable brightness.* Convenient quick recharging.* Anti-recharging and anti-discharging function protects the battery.* Be able to connect with the head of ophthalmo-scope. Parameter:* Working distance: 0.67m* Streak: 3-20mm* Illumination Source: 3.5V/2.8W Halogen Bulb* Streak Rotation: 360°* Input Voltage:AC220V, +/- 22V/50Hz, +/-1Hz ; AC110V +/- 11V/60Hz +/-1Hz.* Power (main body of ophthalmoscope: Li+ battery pack DC:3.7V.-----------------------------------------------------------------------------------------------------------------------------------------------WHY CUSTOMERS CHOOSE US:1. HIGH QUALITY WITH COMPETITIVE PRICE;-SELECT HIGH QUALITY RAW MATERIAL;-SELL GOODS BY FACTORY DIRECT PRICE WITHOUT AGENCY;2. GOOD BEFORE-SALE AND AFTER-SALE SERVICE;-REPLY YOUR ENQUIRY WITHIN 24 WORKING HOURS BY SKILLED STAFF;-ONE TO ONE CUSTOMER SERVICE TO SOLVE YOUR PROBLEM IN THE FIRST TIME;-FOLLOW YOUR FEEDBACK ON TIME AFTER GOODS SHIPPED.3. WELL-TRAINED AND PROFESSIONAL STAFF.-SEVERAL YEARS EXPIRENCE IN THIS FIELD.4. QUALITY CHECK FIRST BEFORE YOU PLACE AN ORDER. -A CERTAIN FREE SAMPLE BY FREIGHT COLLECT IS ACCEPTABLE.YOU CAN CHECK THE QUALITY FIRST, SO THERE IS NO WORRY ABOUT THE QUALITY.5.MOQ IS FLEXIABLE.- BOTH TRIAL ORDER AND BULK ORDER ARE WELCOME.WE DO BOTH RETAIL AND WHOLESALE, SO THE MOQ IS FLEXIABLE FOR ALL CUSTOMERS.6. THE QUALITY OF PRODUCTS ARE GUARANTEED..-THE QUALITY OF MASS PRODUCTION ITEMS ARE CHECKED BY APPOINTED QC BEFORE DELIVERY.7. STABLE PRODUCTION AND SHORT DELIVERY DATE.-WE PRODUCE AND WE CONTROL THE QUALITY FOR YOU. -COMMON ITEMS ARE IN STOCK, FASTER LEAD TIME.8. ONE-STOP PURCHASE-CUSTOMERS CAN PURCHASE ALL KINDS OF OPTICAL ACCESSORIES & INSTRUMENTS FROM US. WE NOT ONLY PRODUCE MANY OPTICAL ACCESSORIES SUCH AS SILICONE NOSE PAD, ANTI-SLIP NOSE PAD, SCREWS ect BUT ALSO HAVE GOOD COOPERATION WITH MANY OTHER MANUFACTUREIF YOU WANT TO KNOW MORE ABOUT US, WELCOME TO CONTACT.Contact person: Miss ZoeTel:+0086-0512-36687362Fax:+0086-0512-36685841Website:hmcoptical.en.made-in-china.com