Programmable mechanical timer switch enhances convenience and smart living. DIN rail installation allows for easy setup. Features: - Mechanical Timer Switch: Large dial with clear scale; quartz movement starts automatically a few minutes after power is turned on - Easy Operation: 24-hour timer with manual switch, supports programmed timing (automatically turns on/off according to schedule) and permanent ON/OFF - Built-in battery for backup - DIN Rail Installation: Easy to assemble and disassemble, offering flexible use - Compact size and lightweight design for easy installation - Transparent Dust Cover: Dustproof and water-splash resistant, extending product lifespan - Transparent design does not obstruct dial visibility - Wide Use: Suitable for street lights, ventilation systems, fountains, advertising boards, production equipment, broadcasting and television equipment, and more - Intended for use in dry indoor locations only Note: 1. Installation must be performed by a qualified electrician 2. Please read the user manual carefully before use 3. Slight variations in size and color may occur due to manual measurement and lighting conditions Specifications: - Model: SUL181h, SUL181d, SUL180a (various voltage options) - Voltage: AC110-230V / DC12V (SUL181h), AC110-230V (SUL181d), AC220-240V (SUL180a) - Material: ABS - Built-in Battery: 1.2V 40mAh NI-MH Battery - Color: Grey (SUL181h, SUL180a), White or Grey (SUL181d, randomly sent) - Contact Capacity: Up to 16A - Power: 1W - 2W - Frequency: 45-60Hz or 50-60Hz - Time Range: 24 hours - Minimum Interval: 15 minutes or 30 minutes - Setting Times: Up to 96 times - Backup: Up to 200 hours depending on model and voltage - Contact Resistance: 50m - Insulation Resistance: 100m - Item Size: Varies by model - Package Size: Varies by model - Package Weight: Varies by model Package List: - 1 x Timer Switch - 1 x User Manual (English)