EX500:

• The EX500 is a current product
• The EX500 is not end of life
• The EX500 is only compatible with bananas

X550: 

• The X550 is not a current product
• The X550 is no longer supported.
• The X550 can not be registered
• There is no software for the X550
• There is no firmware for the X550
• The last time to buy X550 was June 30, 2017
• X550 reached end of support on June 30, 2017    
• X550 reached end of life on June 30, 2020