SMAKN&reg; 5V MAX485/RS485 Module TTL to RS-485 Module MCU Development Board Product Name : TTL to RS485 Module;Fit for : Arduino Working Voltage : 5V;Total Size : 4.4 x 1.4 x 2cm/1.7" x 0.55" x 0.78"(L*W*H) Material : Plastic, Electronic Part;Color : Green Net Weight : 6g Package : 1 x TTL to RS485 Module