Serial port bluetooth  Drop-in replacement for wired serial connections  transparent usage. You can use it simply for a serial port replacement to establish connection between MCU and GPS  PC to your embedded project and etc.<br>HC-06 has be designed Master or Slave when the factory  user couldn't change the role.<br><br><br>Spec<br><br>Bluetooth protocal: Bluetooth Specification v2.0+EDR<br>Frequency: 2.4GHz ISM band<br>Modulation: GFSK(Gaussian Frequency Shift Keying)<br>Emission power: 4dBm  Class 2<br>Sensitivity: -84dBm at 0.1% BER<br>Speed: Asynchronous: 2.1Mbps(Max) / 160 kbps  Synchronous: 1Mbps/1Mbps<br>Security: Authentication and encryption<br>Profiles: Bluetooth serial port<br><br>Power supply: +3.3VDC 50mA<br>Working temperature: -20 ~ +75 Centigrade<br>Dimension: 26.9mm x 13mm x 2.2 mm<br><img src="//gdetail.image-gmkt.com/030/717423496/2016/4/3d6d123b-381a-4236-86d0-980dedfbc558.jpg"  onerror="this.src='http://gdetail.image-gmkt.com/030/717423496/2016/4/3d6d123b-381a-4236-86d0-980dedfbc558.jpg'; $(this).attr('onerror'，'');" ><br><img src="//gdetail.image-gmkt.com/030/717423496/2016/4/f1ce15ee-061e-471d-8433-59bc38df2dfa.jpg"  onerror="this.src='http://gdetail.image-gmkt.com/030/717423496/2016/4/f1ce15ee-061e-471d-8433-59bc38df2dfa.jpg'; $(this).attr('onerror'，'');" ><br><img src="//gdetail.image-gmkt.com/030/717423496/2016/4/b23c3cb6-7005-4472-89be-73562a8cb4da.jpg"  onerror="this.src='http://gdetail.image-gmkt.com/030/717423496/2016/4/b23c3cb6-7005-4472-89be-73562a8cb4da.jpg'; $(this).attr('onerror'，'');" ><br><br><br>Packaging Details<br>Unit Type: piece Package Weight: 0.010kg (0.02lb.) Package Size: 6cm x 6cm x 6cm (2.36in x 2.36in x 2.36in)