Feature: Data Transceiver 1) RF power:≤500mW; 2) Adjacent channel rejection:≥65dB; 3) Transmitter startup time:≤50ms; 4) Interface RS-232/RS-485 and TTL, data rate: 1,200 ~ 9,600bps optional, format: 8N1; 5) Voltage: DC 5V or 12V. 6) Transmission distance can reach 3Km Extend: 1) Update your product'capabilities or create new ones with our simple to use modules; 2)We can provide you in a variety of design and manufactured products at very reasonable prices; 3)Your design and logo are welcome; 4)Excellent technical support available to help you integrate our modules in your product; 5)Offer one-year warranty, 30-Day Satisfaction Guarantee. Contact person:Jancy skype:jancy20061 Yahoo:jancy_20062000