A10/A11/A10W Entry-level business IP Phone
1 SIP account，132 * 52 graphic character dot matrix LCD

A20/A21/A20W Entry-level business IP Phone
2 SIP accounts，132 * 58 graphic character dot matrix LCD

A41/A41W business IP Phone（Support Extension modules RE）
244*128 pixel,FSTN 4 level grey LCD Perfect hardware upgrade WiFi(A41W only)

A48W Color display business IP Phone (Support Extension modules RET)
4 lines IP Phone with 3.2 inch TFT color display TFT color display

A68W Executive level dual display IP Phone
6 lines IP Phone with 4.3 inch TFT color display

Extension modules ( 16 keys) RE (apply to A41/A41W)
Extension modules ( 16 keys) with renewable paper

Extension modules ( 16 keys) RET (apply to A48W)
Extension modules ( 16 keys) with 4.3 inch TFT color display