The GDS3702 is an HD audio IP intercom system that enables remote access control for buildings of any size. This device includes a built-in microphone and speaker to support intercom functionality, supports integration with electric locks for locking and unlocking doors, and provides alarm input and alarm output support for integration with existing security systems. The GDS3702 works with Grandstream's free GDS Manager management software. It features SIP/VoIP technology with 2-way HD audio, IP66 weatherproof housing, and vandal-proof. The combination of GDS3702, Grandstream's IP phones, Wave mobile apps, and other third-party IP devices provide a complete end-to-end solution for access control and intercom needs.