• Wireless serial Bluetooth port with free extension cable 
• Core Modules using HC-06 main modules,leads from the module interface including VCC, GND, TXD, RXD. Reserve LED output pin status,Single Chip Microcomputer can be judged connected or not by the foot state,KEY pin is invalid for slave. 
• LED indicate show connection status,when it is flashing means non-connection, normally on mean it connect successfully 
• Backplane set anti-reverse diode with 3.3V LDO, input voltage: 3.6~​​6V , Unpaired current: about 30 MA, Paired: about 10 MA, input voltage cann't exceed 7V
• Interface level 3.3V, can be directly connected the various SCM (51, AVR, PIC, ARM, MSP430, etc.), the microcontroller can also be directly connected without MAX232
• Effective distance : 10M 
• After repaired,can used as full-duplex serial,supports 8 data bits, 1 stop bit, no parity communication format
• Easy to connect this module with any standard Bluetooth device, just search and key "1234" passcode. 
• Running in slave role: Pair with BT dongle and master module,Simply establish connection between device with bluetooth function GPS, PC,PDA,PSP phone ,Industrial control,etc.

Commonly Asked Questions:

Q1. Why are these called "Arduino Compatible"?
A1. The Arduino group demanded us to remove their logos and rename these products so that they do not lead customers to believe they are the same units sold by Arduino.
 
Q2. Are these real Arduino's, then?
A2. We cannot answer that question without starting a war :(. Officially, the answer is we do not know.
 
Q3. Are these 100% compatible with the "normal" Arudino's?
A3. Yes, they really are completely compatible with "normal" Arduino's. Build quality looks the same and everything (studio, library, tools, etc) just works. Just read the reviews here, here, here, and here.
 
Q4. What if I'm still concerned about the missing logos and about this being named as "Arduino Compatible"?
A4. If you're still in doubt, please buy from Arduino's official dealers. Yes they are more expensive, but if you're still worried we'd rather not take your order. We do not make these afterall and we are providing all the information we know. Don't kill the messenger.