I never could get them to work, maybe I received bad batteries? Great idea. Super small to fit any car door. Should have returned when I still had a chance but ran out of time on purchase:(
CJRSLRB 4Pcs Universal Wireless Car Door Safety LED Warning Light for Anti Rear-End Collision
https://www.amazon.com/gp/product/B07TSNJGR3/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
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