640 bicycle USB charging aluminum alloy front lights 2600 lumens high brightness night riding outdoor cycling light

Domestic price limit: 610 limited to 58 yuan, 620 limited to 102 yuan, 630 limited to 99 yuan, 640 limited to 191 yuan Limit price: 610 limit $24.99, 620 limit $32.99, 630 limit $29.99, 640 limit $42.99, 640 temperature control version 432g reminder 1. Circuit protection: Cross current circuit overcharge protection, over discharge protection, short circuit protection 2. Temperature control downshifting: When the temperature is above 60C, it will automatically downshift back to the medium bright gear, and when the temperature is below 55C, it will automatically jump back to the original gear