employee count: piezo telephone ringer buzzer, v piezo buzzer place of origin zhejiang, china brand name topeast model number telephone ringer name telephone ringer rated voltager vp-p square wave contact now ningbo topeast technology co.,ltd country/region: china business type: - employee count: wall-mounted...
hmds, smartglasses + in-air gesturing, gestures maps, indoor location materials, processes project titan, vehicle technology projection related smart fabric & clothing software + os wireless charging, airpower (failed) see more " apple invention details a prescription lens system for a future head-mounted...
of material or element of test circuit (class / ) with compensation for test variable (class / ) combined (class / ) plural tests (class / ) with means to create magnetic field to test material (class / ) magnetometers (class / ) magnetic field detection devices (class / ) magnetic test structure elements...
it is: the focal length, a mm equivalent, is the very same. so is the f/ maximum aperture and manual control ring. the difference lies in the construction. although the eight elements arranged in two groups remains the same, two of those elements are now aspherical (in the x f it was just one molded...
panels, and a moe 'robust' browse manager. olympus e- digital slr (evolt) sep , at : olympus today announced the second ever four thirds system digital slr, the new e- (to be know in north america as the 'olympus evolt e- '). this digital slr features an eight megapixel / size ccd, it has unique ttl optical...
autonomous drones that can either work together in cohesion for a variety of tasks like surveillance or even attack and can also peel off and undertake independent missions on individual targets. the drones are fully networked with each other through electronic datalinks. using their infrared and electro-optical...
polycarbonate lens • steel base • polyester panel features • available with two sizes of interchangeable panels • panels are reversible with many possible configurations • light + power ports + visual privacy + sound dampening • optimally positioned warm glare-free led illumination • fully dimmable with optical...
interesting - mm f . ex dc macro lens. like all other dc lenses this is designed specifically for digital slr's with aps sized sensors. it offers a maximum aperture of f . throughout the zoom range and a minimum focus distance of cm ( in). in addition the lens features aspherical and low dispersion elements...