Size: diameter about 49 mm, high 195mm Battery voltage: 3V 2 pieces of No.1 battery(shipping not include) Flicker times:60 times/min Purpose: explosion-proof, dust-proof, can be used in the field, can be directly in all kinds of road cones, telescopic road cones, lift road cones, warning on column, guardrail, etc User Manual： I. Operation Instructions Battery Installation: Unscrew the handle and insert two pieces of 1A batteries (pay attention to polarity), tighten the handle, enter the light control sensing mode, automatically turn off during the day, and automatically flash at night. II. Technical Specifications Model: JD-011 Specifications: Lens Diameter: 49MM Handle Diameter 42mm Height: 195mm Weight: 95g (excluding battery) Voltage: 3V Battery: Two pieces of 1A batteries Usage Time > 350 hours Number of LEDs: 5 pieces Flashing Frequency: 60 times/minute Function: Flashing Protection Grade: IP64 Materials: Case Parts: AS; Handle: ABS Visual Distance: 300 meters (in darkness)