Optex VX-402 intruder detection never sounded better. The VX-402REC has a built-in, Digital Voice Driver that can be customized for each application. Reliable Short-Range Detection for External Areas. Ideal for Event Driven CCTV Applications. Two Detection Zones for Superior Stability. Any Message Recordable for Each Application in Any Language VX-402REC. Model: VX-402 : standard model. Model: VX-402REC : standard model with voice warning facility