Product Name: TPV180 Portable Near Vision Acurity Home Use Hand Held Battery Refracto Meter Manual Refractometer Model NO.: TPV180 Customized: Non-Customized Application: Optical Shop Type: Ophthalmic Refractometer Trademark: SHTOPVIEW Origin: Shanghai HS Code: 9018500000 Product Description Four colors available:Blue, Purple, Pink, Golden.Please leave message for:quantity + color.Pupilla vision refractometer helps find vision problems early.With it, you can know your vision situation without ophthalmologist's help anytime and anywhere.Ultra-portable and easy to carryEasy operation and suitable for children,adolescents and adultsSpecifications:Suitable forChildren, adolescents and adultsColorChina Red (R),Sapphire (B), Harvest Yellow (G),Pink Dream (P), Roland Purple (V), Titanuim crystal Gray(S)Spherical Range-12D to +6DSpherical Degree wide interval0.5DSpherical Degree of tolerance±0.25DlightingLED backlight, and the light is uniformity, constant, not reflective and not dazzing.Switch ModeLED lamp touch switch, instrument will shut down automatically after three minutes' shelving.PowerThree 7# batteries(AAA)ServiceProfessional service website. Users can input personal vision information; Forecast user'svision direction according to historical data, provide vision care knowledge and glassesreference information, etc.Net Weight299gPackaging200mm(L)X 100mm(W)X 65mm(H)