CAT EYE Automatic Flashing Tail Light Black Backstay Mounting Type Bicycle TL-AU165-BS-GR

Size: 46×46×40.5mm Weight: 35g (body + battery) Battery used: Lithium battery CR2032x1 Usage time: Flashing: Approximately 100 hours The "automatic flashing taillight" has two built-in sensors: a brightness sensor and a vibration sensor.