Pls Unlock light if light cannot turn on when first use If cannot turn on and the tail indicator light in red flash. it is not quality problem. for safe shipment, the light locked, pls kindly unlock light by long press low beam and high beam button for 5 seconds at same time, till the light in green flash, then long press to turn on. Here are the RHL3000D operate video for referece , pls unlock light as video Tips: When you receive the product, you need to press and hold both the high beam and low beam buttons simultaneously for five seconds to unlock the product. Then press any key for 1.5 seconds to use normally. Product information Product detail Material:Aluminum alloy Lamp beads model:3570 30w Lamp beads*2 Battery model:2-21700lithium battery 10000mAh Low beam position:Four Modes Low Beam Endurance:4-30h Low Beam position:Two Modes Low Beam Endurance:2.2-7.2h Charging time:about 5.5h Output Power:5V1A Input Power:5V2A Warranty:1year Product feature Low Voltage Protection Charging Indicator Light Low Battery Reminder Gear Memory 6 Brightness Adjustments for Easy Operation Intelligent Temperature Control Type-C Charging Bicycle High Beam and Low Beam Hanging Front Light Dual-Light Illumination High and Low Beam Switch Multiple Adjustable Modes 6 Brightness Adjustments for Easy Operation Press and hold for 1.5s to switch on and off, double-click the low beam button to enter the warning gear,and automatically record the current gear after shutdown(Low Beam Only) Press and hold the high beam button, turn on the low beam and high beam at the same time,and both the high and low beam modes are set at 1500 lumens Hanging-style Installation, Easy Operation Align the bicycle light with the bracket at the hanging point, tighten the bolt (the meter and bracket are for display purposes only) 3000 Lumens High Brightness Long-Range Beam for Safer Night Riding When both high and low beams are on, the combined illumination reaches 3000 lumens, providing ample light coverage for nighttime cycling Battery Indicator Light for Real-time Power Monitoring Check the remaining battery power through the tail indicator light status Intelligent Temperature Control + Low Voltage Protection for Longer Lifespan Equipped with internal temperature measuring components.When the lamp bead temperature exceeds 70 degrees, it will automatically downshift, and if the temperature exceeds 100 degrees, cut off the power and shut down When the power is lower than 15%, only 400lm and 200lm are allowed to be adjusted; the battery voltage drops to the warning line to cut off the power supply to protect the battery Automatically cuts off power when the battery is too low to protect the battery 10000mAh Capacity for Use as a Mobile Power Source Equipped with two 21700 lithium batteries with a 10000mAh large capacity, the tail output interface can be used as a mobile power source Type-C Interface for Convenient Charging at Home and on the Go Type-C charging interface for fast charging. During charging, the rear red light will breathe and flash, turning solid green when fully charged =

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