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Up for sale is one Olight RN800 Rechargeable Waterproof 800 Lumens LED Bike Headlight w/Battery, 100%Authentic. This item is NEW in sealed manufacturer's retail package. Shipping is FREE anywhere in the continental USA.

Description from the manufacturer:

Born to Take Challenges
RN 800 is specially designed for serious cycling demands, and challenging riding conditions. It is a multi-functional bicycle light powered by a 4000mAh 21700 battery with a maximum output of 800 lumens. All in one design bike headlight suitable for road, urban riding. Anti-glare light distribution with safe cut-off line, to reduce visual distractions for motorists, cyclists or pedestrians. It introduced USB-C charging & discharging integration port that supports heavy current. Hence, to bring faster charging & discharging experience. RN 800 can be tightly installed on out front mount, or under GOPRO camera mount. It is a powerful, reliable companion in the dark.

800LM output with high efficiency LED
Anti-glare lens design, increase riding safety
High capacity 21700 battery with 4000 mAh
USB-C fast charging& discharging port saves you more time
Easy-to-read multiple battery power indicator
IPX6 waterproof rate, capable to withstand water immersion up to 1 m depth
Easy and multiple mounting methods with Garmin mount
Tough metal case, ensures longer life durability

Specifications:

Beam Distance (ft): 449
Beam Distance (m): 137
Max. Performance (lumens): 800
Charge type: USB-C Charging
Compatible Batteries: 21700 4000mAh Battery
Light Form: Luminus SST-40
Series: Bike Light Series
LIGHTING LEVELS

LEVEL 1 (lumens): 800
Run-time LEVEL 1: 120 minutes
LEVEL 2 (lumens): 400
Run-time LEVEL 2: 240 minutes
LEVEL 3 (lumens): 200
Run-time LEVEL 3 : 8 hours
LEVEL 4 (lumens): Flash 1 (0-400 lumens)
Run-time LEVEL 4 : 9 hours
LEVEL 5 (lumens): Flash 2 (0-700 lumens)
Run-time LEVEL 5: 7 hours

Waterproof: IPX6
Weight (g / oz): 172 / 6.07
Length (mm / in): 107 / 4.21
Height (mm / in): 31/ 1.22
Width (mm / in): 31/ 1.22
Fit handlebar diameter: 28.6-35 mm (3 sizes of straps supplied)
Led: Luminus SST-40
Use: Daily Commuting, Urban Riding, Road Cycling

In the box:

RN 800 (batteries included) x 1
Handlebar mount x 1
GOPRO mount x 1
Silicon strap x 3
USB-C cable x 1
3mm hex x 1
User Manual x 1