Specifications and dimensions: about 59*29*10mm Color: black Solar automatic charging----Solar automatic charging, USB auxiliary charging can be used for long periods of time on cloudy days Super long battery life----Super long battery life Long battery life, can be used for ten years on a single charge days, and smart sensors require no manual use. High-quality material----heat-resistant ABS material, not afraid of sunlight, improving driving safety. Advanced design----intelligent sensor, absorbs sunlight without flickering during the day, and automatically flickers at night. Red light/blue light optional, technology upgrade, environmental protection and energy saving. Our LED high-gloss lamp beads will automatically flash when the light is low. Easy and simple to use--the flashing pattern of this car warning light can be easily controlled through the setting switch on the back. It's super sticky and less noticeable, making it easy to install and remove thanks to the non-marking double-sided tape on the bottom. Packing list: 3 pieces of equipment Note: 1. Please allow 1-10g/1-3cm differences due to manual measurement. 2. Due to differences in monitors and lighting, the pictures may not reflect the actual color of the item. Thank you for your understanding.