... **o Nano technology parameters :1.14 digital input / output port TX , RX, D2 ~~ D132.8 analog input ports A0 ~ A7Of 3.1 ... pairs TTL level serial transceiver port RX / TX4.6 PWM port , D3 , D5 , D6, D9, D10, D115 ... , DHL etc, please communicate with us about the increase shipping.5 Instruction:The shipping time is depends on the buyer's ...