<b>Specification:</b> <br>1. Weight: About 80g <br>2. Brightness: 500 lumens <br>3. Charging time: 2 hours <br>4. Working time: about 6 - 8 hours <br>5. Remote Control Power Supply: 1 x CR2025 3V Lithium Battery (replaceable) <br>6. Taillight power supply: 800 mAh Built-in battery (not interchangeable), the red light indicates that the battery is charging and a green light indicates that the power supply is full. <br><br><b>Operation steps:</b> <br>1. Check the button rinse by pressing the power switch on the tail light for 4-6 seconds. <br>2. Press the button on the remote control for 3 seconds to check if it is connected. <br>3. The middle click button on the remote control can control the red LED warning light. You can control the indicator light in the yellow LED direction with the left and right buttons.