EP821 is a self-developed high-end broadband cluster handheld large screen terminal, which is a powerful cluster terminal in the private network industry. It can simultaneously support private calls, group calls, SMS and MMS, broadband data access, video scheduling services, and multi service concurrency. Supports a 5-inch high brightness touch screen, The Android intelligent operating system can be widely applied in multiple industries, achieving professional cluster scheduling, multimedia scheduling, and broadband data functions.