CHJ-9934 is my company using Taiwan's production of RF integrated circuit design, superheterodyne work, SAW resonance, with good stability, strong anti-interference characteristics, Widely used in demanding industrial control and other occasions. Scope of application: 1. reception of various low-rate digital signals; 2. Industrial remote control, telemetry, remote sensing 3. Anti-theft alarm signal reception, a variety of household appliances such as remote control. Technical indicators: Operating Voltage 5.0VDC ± 0.5V Working current ≤5.5mA (5.0VDC) working principle superheterodyne Way of working OOK / ASK working frequency 315MHz, 433.92MHz, special frequency can be customized Bandwidth 2MHz (315MHz, sensitivity down 3dBm test) Sensitivity Better than -107dBm (50Ω) Rate <9.6Kbps (315MHz, -95dBm) output signal TTL level signal transparent transmission Antenna length 24 cm (315 MHz), 18 cm (433.92 MHz)