Main Chip: ENC28J60-I/SO;Power supply:3.3V. | RJ45 connector HR911105A isolation transformer. | Board size:56mm x 34mm/2.2Inch x 1.33Inch.

【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.