The device is fully compatible with older infrared standards, including SIR (2.4 Kbps to 115.2 Kbps) and MIR (576 Kbps to 1.15 Mbps).
Fast Infrared (FIR) is a physical layer standard defined by IrDA. FIR supports speeds of 1.152 Mbps and 4 Mbps. Devices that support FIR are substantially faster than older SIR (Slow Infrared) units, reducing data transfer latency from seconds to milliseconds for common file sizes. U2IrDA Mini 4 MBPS FIR USB IrDA 20
: Fully compliant with IrDA 1.1 and USB 1.1/2.0 specifications. Primary Applications and Use Cases The device is fully compatible with older infrared