The AF-S DX Zoom-Nikkor ED 12-24mm f/4G IF is a high-performance, internal focusing (IF) lens that uses a Silent Wave Motor to drive the focusing mechanism, hence the “S” designation. As a result, autofocusing is smooth, silent, and almost instantaneous. Autofocus (A) or manual (M) mode can easily be selected with the focus mode switch. Autofocusing with manual override is provided, allowing instant change from autofocusing to manual focusing. More accurate exposure control is possible when this is mounted on a Nikon camera.

The SDWJ series of small current grounding switch devices is a companion product of the new generation of substation automation systems independently developed by the Sanda Electronics & Electrical Co., Ltd. This product adopts the transient harmonic current selection principle and adopts advanced microcomputer digital technology. It has the function of rapid and accurate ground fault detection, and can realize single-phase ground fault selection to prevent non-fault phase insulation from being broken and phase-to-phase short circuit.

Neumann GPS Navigator-Q71HD User Manual, introduces product features, usage precautions, etc