... /TTL level interfaces for direct connection with computers,ATC-863-S1 has adopted half duplex communication channel most suitable for point ... transmission channel built by ATC-863-S1 is transparent to the user. ATC-863-S1 can also be applied to point to ... ) 12,Transmitting current: (A) ≤30mA Receiving current: ≤10mA(1200bps) 863-S1 ATC RF Power Module