OCB-LE-BDV2 Accessory PackageFEATURESEnhance your security system with the OCB-LE-BDV2 Accessory Package. This high-quality package includes essential components to expand the capabilities of your security system. - 2 module accessories - used for Surface mounting - includes 2 module frame - 2 module front panel and some other necessary accessories . Advantages: Essential components to expand the capabilities of your security system Compatible with OCB-LE Series Intercom Systems Easy to install and use Two module connecting interfaces for enhanced functionality Relay output for integration with other security systems Tamper alarm input for added security Lock open input for easy access control DIP switch for customized settings Compact and durable design IP65 and IK7 protection for reliable outdoor use.