The Ravemen LS500 + TR20 Combo Lightset is a top - notch choice for daily commuting and urban cycling. The LS500 comes with a brand - new curved lens optical design. It emits an evenly - distributed flood light that also offers side visibility, making it perfect for road cycling and daily trips. With its battery run - time extension function, it's also great for long - distance bike travel or races. The Ravemen TR20 is an amazing rear light. It weighs only 20 grams and has a maximum of 20 LED lumens. It's super compact, lightweight, and bright. Thanks to the quick - release clamp mount, you can easily use it on your seatpost or helmet for your daily commute or road cycling. The LS500 features a specifically designed curved lens for even light distribution and side visibility. You can extend its battery runtime by connecting an external power source. There's also a wired remote button (sold separately) so you can change brightness safely without taking your hands off the grips. It has multiple brightness levels and a daytime - visible rapid flash. It charges via a Micro USB port, compatible with most phone chargers. It's compact, lightweight, and has an intelligent memory circuit that remembers your last used setting. The quick - release design allows for easy installation and removal, and it fits handlebars from 22.2mm to 35mm in diameter. The TR20 uses a highly efficient COB LED with a max of 20 LED lumens. Its quick - release design meets various needs. The specially designed lens provides rear and side visibility. It has auto power - save and a low - battery indicator. It also charges via a Micro USB port and has built - in battery and charging indicators. Like the LS500, it has an intelligent memory circuit. The LS500 has a 1*CREE XP - G2 LED with a 50000 - hour lifespan and a 2200mAh/3.7V rechargeable Lithium - ion battery. Its headlight dimensions are 85mm (L)*36mm (W)*30mm (H) and weighs 119g. The front and main body are made of aluminium with Mil Type III Hard Coat Anodizing, while the rear part and handlebar mount are made of durable plastic. The TR20 has a COB LED and a 200mAh/3.7V rechargeable Li - polymer battery. Its dimensions are 18mm (L)*22mm (W)*52mm (H) and the light unit weighs 15g. It's compatible with seatposts from φ 24 - 36mm.

Using the Ravemen LS500 + TR20 Combo Lightset is easy. For the LS500, first, mount it on your handlebar (it fits handlebars from 22.2mm to 35mm in diameter). You can use the quick - release design to slide it in and out quickly. To charge it, simply connect it to a phone charger via the Micro USB port. You can extend the battery runtime by connecting an external power source. If you have the wired remote button (sold separately), you can change the brightness level without taking your hands off the grips. When you turn it on again, it will remember the last brightness level and mode you used. For the TR20, you can mount it on your seatpost (compatible with φ 24 - 36mm seatposts) or helmet using the quick - release clamp mount. Charge it in the same way as the LS500, with a Micro USB port. It also has an intelligent memory circuit. Some things to note: Don't expose the lights to extreme temperatures. When charging, make sure the charging cable is properly connected. If the battery indicator shows low battery, charge it as soon as possible. For maintenance, keep the lights clean. You can use a soft, dry cloth to wipe them. Avoid using harsh chemicals as they may damage the lights.