Features: 1) CO. line: 2 - 4 2) Ext. line: 8 - 16 3) Caller ID 4) Call forwarding / do not disturb 5) All transfer and call pickup 6) External line group 7) Multiple dial-out modes 8) Music on hold 9) Power failure transfer 10) Intercom calling Inner packing: Box dimensions: 325 x 210 x 60mm Outer packing: 5pcs/ctn Carton dimensions: 435 x 420 x 315mm Weight: 12.5kg