【HC-05 Wireless BT Module】With this HC 05 Bluetooth module,You can quickly add the Bluetooth feature to your motherboard project, and then you can use your smart phone to control some gadgets, such as: switch, LED. | 【Working Voltage】3.6V to 6V,Default baud rate:9600,Default pin:1234,Press the button; the module enter the AT mode. AT commands are executed only in AT mode. | 【master and slave mode】Its communication is via serial communication which makes an easy way to interface with controller or PC. It's ideal replacement to your wired serial connection. | 【Application】Used for GPS navigation system, water and electricity gas meter reading system.

Size:40mm×40mm/1.57"×1.57";Working current 4.3-4.6A;Lead length 300mm,RV standard line single head. | Uses:Can be used for CPU cooler, backup power supply, car portable cooler, liquid cooling, etc.It can also be used for DIY to make car drinks warm/cold, cool or heat in minutes. | Note: The side marked "TEC1-12706" is the cooling side and the other side is the heating side;Should be used with a radiator to avoid being burned out,coated with thermal grease on radiator surface. | Features:Small size,light weight;Precise temperature control,excellent performance,high efficiency. | How it works:By simply reversing polarity, it gets cold or heated to boiling in a matter of minutes.