Gate PULSAR S HPA Engine with TITAN II Bluetooth Rear WiredPULSAR S HPA Engine with TITAN II Bluetooth the worlds smallest & most advanced single solenoid HPA engine. The first HPA engine controlled by an ETU with optical sensors. Thanks to the newest flagship TITAN II Bluetooth combined with HPA technology you get a ludicrous trigger response, unknown before in the airsoft world. With the user friendly GCS app for smartphones you can manage your settings live, even straight from the field! Set the fire