https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions
Product Info
Small size low power RF Transceiver 400mW 2Km 5V 400-470MHz TTL KYL-500L

Small size low power RF Transceiver 400mW 2Km 5V 400-470MHz TTL KYL-500L

KYL communication equipment co.,Ltd
Region: China
Update: 09/24/2014
Key Specifications
KYL-500L, the micro power wireless transceiver data module is designed for wireless POS terminal. With small size, low power consumption as well as good stability and reliability, it is also widely used for other embedded systems.

400mW 2000m@1200bps; 1500m@9600bps

5V DC (3.3V-3.6V optional)

400-470MHz

8(default),16/32/64(optional) Channel

TTL/UART

https://www.asmag.com/project/resource/index.aspx?aid=16&t=secutech-made-in-taiwan-products-and-solutions