Blackwire™ C420 is a series of headphones provided by Plantronics, suitable for critical, business applications and personal communication entertainment. Users can register the product online at plantronics.com/productregistration to receive the best service and technical support.

This product manual provides detailed information about the characteristics, extreme working parameters, inherent characteristics, external dimensions, load working characteristics, electrical connections and other information of YS50-40258-220 DC brushless motor

E640 is a new generation high-precision static measurement system developed by Hezhong Sizhuang. It features an integrated design that combines GPS antenna, GPS receiver, lithium battery, and data storage. The system has excellent performance in tracking multiple GPS satellites, and it is waterproof, dustproof, and shockproof. It is easy to operate and has a large storage capacity. It can be widely used in control measurement, engineering measurement, GIS data collection, cadastral survey, and area measurement.

This document is the K7 WinCE User Manual, which describes the features and characteristics of the K7 MID software system, including pre-installed software, BSP features, and system quick operations and development processes.