Dear，Pls leave a massage to tell us what design (Color) do you want.thank you.

SKU: ZSB02HQFeature: Comes with 4 different rotation wheels， 3 adjustable modes， ft/min， m/min， rpm Last Value / Max. Value / Min. Value， Value may be automatically stored in memory and 96s of measured value continuously New surface speed sensor with flute vails to measure speed and length of wire， cable and rope conveniently With 6V power port， can be connected with 6V direct current stable voltage power Microcomputer(CPU) technique， wide measure range and high resolutionSpecification: 3 Mode: ft/min， m/min， rpm Range: Contact Tach: 0.5 to 19999RPM Surface Speed(m/min): 0.05 to 1999.9 m/min Surface Long(m): 0.05 to 99999m Resolution for Contact Tach: 0.5~999.9RPM: 0.1RPM Over 1000RPM: 1RPM Resolution for Surface Speed: 0.05~99.99m/min: 0.01m/min Over 100m/min: 0.1m/min Resolution for Surface Long: 0.02m (0.05 to 99999m) Display: 5 digit， backlight LCD Accuracy: +/_0.05% + 1 digit Sampling Time: 0.8 sec (Over 60RPM) Range Select: Auto-range Time Base: Quartz Crystal Power Supply: 4 x 1.5V AA Battery (Not Included) Material: ABC Plastic housing LCD Size: 47 x 27mm Meter Size: 16 x 7.2 x 3.5cm Net Weight: 176gPackage Content: 1 x Contact Tachometer 4 x Rotation Heads 2 x Screw 1 x User Manual