Description: Big red round warning light can serve as a striking warning signal for safety. Automatic charging during the day, automatic lighting at night(no plug or no wired needed) Made of hight quality plastic material, durable and safety. This product only has flashing light warning, no sound effect. Suitable for the security booth, road entrance, construction site, airport, etc. Specification: Material: Plastic Accumulator capacity:500mAh Solar panel current: 100mA Working voltage: 3V Power: 2.5W Led bead: 3-4PCS Flash frequency: 50 times/min Visible range: 500-1000m(in the night) Full power continuous time: 60hours Light color: Red Size(W x H ): approx. A#:80x120mm/3.15x4.72inch B#:80x142mm/3.15x5.59inch C#:80x145mm/3.15x5.71inch D#:81x 124mm/3.19x4.88inch E#:81x144mm/3.19x5.67inch Size Chart: How to distinguish these 5 lights ? A#: Screw type: 3 screws are fixed at the bottom, 3 holes need to be punched in the construction fence (products include screws) B#:Fixed sleeve type : cover the 2-inch steel pipe and tighten the screws C#: Insertion type: need to be inserted on the bolt which is directly 20MM, such as road, warning post, tower crane, through the hole with iron bar, broke and fixed.(hole dia:5mm) D#:Magnet type: can be placed on the iron E#: Insertion type: need to be inserted on the bolt which is directly 35MM, such as road, warning post, tower crane, through the hole with iron bar, broke and fixed.(hole dia:5mm) Package Includes: 1 Piece Warning Light Note:(2 Pack) Please allow 1-3mm error due to manual measurement, make sure that you do not mind before you bid. Due to the different monitor and light effect, the actual color may be slightly different from the picture color.