BlackBerry Curve 8520/8530 Smartphones User Guide, introduces the basic functions and usage of the phone, including phone, text messages, email, files and attachments, media, browser, date, time and alarm, personal management assistant, ringtones, sounds and alerts, typing, etc.

Quick Start Guide, introduces the features and characteristics of the SYMBOL DS3478 product, including appearance, functions, usage methods, troubleshooting, etc.

The AXIS 225FD is a high-performance fixed dome network camera designed for professional surveillance and remote monitoring. It features anti-violence design for maximum protection and supports progressive scan technology and day/night auto-switch. The camera supports PoE functionality, reducing installation costs and enabling centralized power management. It offers both M-JPEG and MPEG-4 streams for optimal image quality and bandwidth efficiency. The camera has a maximum frame rate of 30 fps at VGA resolution and supports multi-window motion detection with alarm image buffering.