Answer:  1, Launchx431 diagun iii

                  1)Thisitem is original one ,have multi-language to choose,

                  2)supportwired and Bluetooth wireless diagnosis

                  3)suitablefor most of vehicle from the world

                2, Launch x431v

                 1). Supported Multilanguage Language

                 2). Wi-Fi: Supported 

                 3). Bluetooth: Supported

                 4). Dealer Code: 86A

                 5). Easy to Update:Online update, Support Online one-click update

                 6) support full range car model from USA,European and Asian

                 3.Autel Maxidas DS708

                 1) Extensivevehicle coverage for more than 30 domestic

                  2)Deep vehicle system coverage for ALLelectronic systems

                  4)Automatic Wi-Fi updates available innew software releases

                  5)Complete function capability includinglive data

                  6) UnparalleledOBDII functionalities

                 4,Autel Maxicheck Pro

                  1)    includeAnti-Lock Brakes (ABS),

                  2)    includeSupplemental Restraint System (SRS),

                  3)    includeElectronic Parking Brake (EPB), 

                  4)    includeSteering Angle Sensor (SAS),

                  5)    includeOil light resets, and Tire Pressure Monitoring System (TPMS).

                   6)    Supportbrands vehicles form the word

                 5, SD Connect C4

                  1)     Supportfor all current and new coming MB vehicles

                  2)   readcode, clear code, live date offer, computer programming for all benz car.

                  3)   Supportmulti-language

                  4)   supportwireless diagnosis

                  5)   supportonly KL diagnosis and three lines CAN BUS diagnosis and UDS diagnostic treaty

                 6.BMW ICOM A2+B+C

                 1)A2 - OBDdiagnostic supporting MOST, D-CAN and K-CAN protocols

                 2) B - diagnosticvia MOST bus, and have connection to A-interface via USB connection

                 3)support BMWcars till 2013 year

                 4) Support for BMW & MINIfull system diagnose and offline programming