GFKS technology, LoRa remote spread spectrum technology, half-duplex communication, super anti-interference (channel rejection ratio: 56 dB), high receiver sensitivity (-139 dBm), ISM multi-band operation (license-free), multi-frequency selection, multiple transmission rates, compatible with FDMA and FM technology. Features intelligent reset, low-voltage monitoring, wake-up timer, low-power mode, and sleep mode. Low power receive current: 10–12 mA. 256-bit TX/RX RSSI channel detection. Transmission modes: Direct Mode (recommended) and Packet Mode. Configuration options: AFC, Wake on Air, Low Power, Carrier Sense, FEC error correction, and encryption. Ultra-long-distance transmission up to 3 km in open areas. Color: blue. Material: PC + metal. Frequency: 868 MHz. Package includes: 1 × LoRa module. Note: Color may vary slightly due to lighting and screen settings. Measurement tolerance: ±1–3 cm.