... intercom earphone interface etc.Three proofing designGB of six waterproof, dustproof, drop military designSPECIAL FUNCTION1 Expanded 3G wireless front video collection two-way ... intelligence two-way on the code, added visual remote control function, we can remote control taking pictures, video, recording, intercom and ... best quality in china, with night vision, waterproof IP56, two-way voice talkback