We will test it before shipment. Weight:0.036kg (0.08lb.) Product Name: Programmable timer relay moduleWorking voltage:DC12V (normal operating voltage DC10V-16V)Source:DC4V ~ 20V (positive trigger common power button, PNP sensors, PLC signals, etc.)Output capability:You can control the DC or AC 220v5A within 30v5A withinQuiescent Current:20mA,working current:50mALife:more than 10 million times;Working temperature:-40 ~ 85'C;Weight:about 26gDimensions:64.2mm * 34.8mm * 18.5mmFeatures:anti-reverse voltage input circuit, worry-free wiring. Signal input optocoupler isolation, anti-interference ability. Set the parameters of power and permanent memory. Powerful flash MCU online programming capabilities, according to user needs can contact the manufacturers to customize the functionality.Features:Receives a trigger signal to start the countdown, while the relay, timing the end of the relay to stop working, time to recover to the set, waiting for the next trigger.Instructions:Click K1 enter the time setting, one hundred digital start flashing, then press K2, one hundred the number of changes; then click K1 ten digital start flashing, then press K2, the tens digit changes; then click K1 bit digital start flashing, then press K2, single-digit change; then click K1, exit the setting, LED no longer flashes.Normal digital tube display, press K2, shifting the decimal point, a decimal point indicates 0-999 minutes in 10 bit from 0 to 99.9 seconds with no decimal point represent 0-999 seconds; to this time setting is completed. Package Included :1 x 12V Delay Timer Relay Control Programmable Switch ModuleMore switch relay please click this link!