Key Features:
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HC-SR04 Compatibility: Drop-in replacement with added features 
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Multiple Output Modes: UART, I2C, GPIO, 1-Wire supported 
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Low Power Usage: Only 2mA current draw, ideal for battery-powered devices 
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Reliable Range Sensing: 25 cm blind zone with a 4.5 m detection range 
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Built-In Smart Chip: Uses proprietary RCWL-9625 for enhanced performance 
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Wide Voltage Support: Operates between 2.8V and 5.5V 
Specifications:
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Model: RCWL-1605 
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Chipset: RCWL-9625 
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Operating Voltage: 2.8V – 5.5V 
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Operating Current: 2mA (ultra-low power) 
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Blind Area: 25 cm 
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Max Range: 4.5 meters (typical) 
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Output Modes: GPIO (default HC-SR04 mode), UART (9600 bps, N, 1), I2C, 1-Wire 
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Compatibility: HC-SR04 protocol 
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Trigger Signal: ≥10µs HIGH pulse on TRIG pin 
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Echo Output: Pulse width proportional to distance 
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Interface Configuration: Resistor-selectable output modes 
Applications:
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Robotics and obstacle detection 
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Smart bins and proximity-based automation 
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Reverse parking sensors or smart vehicles 
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Industrial distance measurement and automation 
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IoT devices with smart sensing capabilities