Feature: 1. Compact and Convenient Use: The compact size of this self locking relay module allows discreet installations in all door types, enabling convenience and practicality in your daily life. 2. Active Infrared Technology: Equipped with active infrared and microprocessor technologies, the momentary self locking relay module provides high performance safety features for your family and others. 3. Easy Installation: The Self Locking Switch Module has a simple installation without completed tools and steps, also providing quick sensitive response for efficient usability. 4. Automatic Operation: The self locking relay switch module intelligently interprets the movement in its field, enabling automatic operation, ideal for commercial malls and home or garage use. 5. Enhanced Access Experience: The fully automatic operation of this active IR self locking relay module with exceptional sensitivity, providing you with a comfortable and hands free door opening experience. Specification: Item Type: Self Locking Switch Relay Module Technology: Active Infrared, Microprocessor Detection Mode: Presence (through interrupt beam) Response Time: <40ms Adjustment (through DIP) Switch: Single/Double beam Normal/Inverted Output Narrow/Normal Range Test/Normal Operating Temperature: -20°C to +55°C Power Supply Voltage: 12-24V AC/DC Output Results: Contact Maximum Voltage: 1 or 2 relays (non-voltage contact) 50V DC/50V AC Maximum Current: 1A (resistive) Maximum Switching Power: 30W(DC)/50V(AC) Minimum Range: Approx. 1m / 3.3ft Maximum Range: 4m / 13.1ft for minimum height of 0.2m / 0.7ft 8m / 26.2ft for minimum height of 0.4m / 1.3ft Cable Color: Receiver (Blue+Black) Transmitter (Blue+Gray) . Package List: 1 x Host2 x Emission Cables2 x Emission Sensors2 x Receiver Cables2 x Receiver Sensors1 x English Instruction Manual