The APC220 radio module provides a simple and economic solution to wireless data communications. Integrates an embedded high speed microprocessor and high performance IC that creates a transparent UART/TTL interface, and elminates any need for packetizing and data encoding. If you are looking for a low-cost solution with better range performance, this has being our customer choice for a long time now. With this module, you can build wireless projects in an easy way. Specification Voltage: 5V Transmit distance up to 1000m (line of sight) @9600 bps 256 bytes data buffer High sensitivity (-112dbbm @9600 bps) GFSK modulation UART/TTL interface Embedded watch dog Size: 37 x 17 x 6.5 mm (1.46x 0.67x 0.26 in) Documents User guide Datasheet Wiki (APC220 Radio Communication Module) RF-Magic Configure software Shipping List APC220 module x2 Antenna for radio communication x2 USB to TTL Converter (CP210) x1 Projects Setting it up and initial testings