Product  Name:  ELM322
Part No: E005
Net  Weight:    0.3KG
Productn Description:   The ELM322 OBDII Interface, allows you to talk to your VPW (10.4KHz J-1850 VPW) standard OBDII equipped vehicle using an RS232 serial connection. It is typically used in US cars from General Motors and others. It transparently converts between a VPW J-1850 data stream and standard ASCII characters, allowing trouble codes and operating parameters to be easily retrieved without the need for special software.

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Product  Name:  ELM327
Part No:  E003
Net  Weight:  0.3KG
Productn Description:  ELM327 is the latest PC-based scan tool. It supports all OBD-II protocols and is dispatched with a number of compatible programs. The processor is an ELM327. The output protocol (connection to laptop) is RS232. 
Processor: ELM327

Product Name:  ELM320
Part No: E006        
Net Weight:    0.3KG
Features: The ELM320 OBDII Interface, allows you to talk to your 41.6KHz J1850 PWM OBD (On Board Diagnostics) equipped vehicle through a standard RS232 serial connection, using only simple ASCII commands.

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Product Name:   ELM327 USB
Part No: E002  
Net Weight:   0.5KG
Features: ELM327 USB is the latest PC-based scan tool. It supports all OBD-II protocols and is dispatched with a number of compatible programs. The processor is an ELM327 USB. The output protocol (connection to laptop) is USB. 
Processor: ELM327 USB