Apen Wifi Wireless ELM327 Obd2 OBDII Car Diagnostic Reader Scanner Adapter WIFI Wireless ELM327 OBD2 OBD II Car Diagnostic Reader Scanner Adapter 1.the chip is ARM chip which speed is more faster and the communication speed is doubled than before one(CLK DEVICE) 2.the shape looks elegant and refined, the design is near the Apple style,compared the (CLK DEVICE),this new device is more exquisite,it doesnt using the cable but(CLK DEVICE) having. 3.It has the function of power be off and energy keeps saving automaticly.When the main chip were detected not in communication for an hour then the device will be off automaticly and get into energy saving state 4.it only comsumes 3 microamp electric current which saved much for the cars power supply system.