Model 7039 Quantity 1 Color Black + silver Material Plastic + PCB + iron Specification Voltage: DC 5V; Power indicator output LED indicator; TTL output; TTL output effective signal is low level; Drive capability: about 100mA; Can directly drive relay buzzer fan; The sensitivity can be adjusted by potentiometer; The LED will light up the high level as no rain; As rains output low level LED is on Features Sensor Application DIY project and other electronic products English Manual/Spec No Packing List 1 x Control board 1 x Raindrop checkout console 5 x Connection cables (20cm)