SAFETY- bike light fits all situation perfectly no matter for -lit urban cycling, road or dangerous mountain biking; high-powered LED Light produces 350 with 4 unique brightness levels, lighting the ways and alerting others of your presence, and two yellow side lights increase overall visibility on the road, especially at intersections.LCD BIKE COMPUTER - bike odometer computer records with average speed, maximum speed, current speed /kph, time, odometer, single trip distance to keep of your cycling effectively, more functions with mode, a speed comparator, maintenance, trip time, etc. sensor with magnet can cycling speed accurately. Bright LCD display to statistics.SECURITY RAY - bicycle light comes with both a headlight and a tail light making your bicycle stand out with unmatched visibility, Up to 50 in distance like low beam safety lighting with a wide angle - Alert drivers on all side with flashing blinking side lights - stay safe on your bikes & see what's ahead in full . Instantly your visibility & safety with Ultra Bright LED bike light.USB RECHARGEABLE BIKE SPEEDOMETER -water-resistant bike light and bicycle speedometer comes with the USB rechargeable function front bike light, all you need is a USB cord and a power source to recharge (Computer, laptop or a cellphone charger), the 1500mAh lithium- internal battery can be hundreds of , making an inexpensive and environmentally sound to disposable batteries.WIDE APPLICATION-bike speedometer more than a bike speedometer for night . This bike light set is versatile enough for cycling, hiking, camping, or any outdoor activity and can be used as an emergency flashlight. Bike taillight is simple to operate with 3 modes--Constant Brightness; Fast Flash; Slow Flash which can keep a safe distance at night.How to Install:1.Unscrew the magnetic head by hand and install it on the vehicle spoke.2.Stick the rubber sticker to the receiver.3.Install the inductor on the front fork opposite the discbrake.4.The head alignment between the two sensors, shall not be 3mm.How to change the km/h to :The default is the metric system. Press MODE(+) and SET(-) key for 5 seconds at the same time, the system enters soft , all are cleared. Now press the SET (-) button and the unit switches to m/h, then press MODE(+) button to confirm.How set up the Wheel size:Find the size of your tire (located on your tire), and multiply your wheel's diameter by 3.14 (pi). Then convert that value into centimeters. That will be the value you enter into the bike computer (After pressing the +Mode and -Set buttons simultaneously and choosing your unit of speed (m/h or km/h). You have to round the number off to the nearest whole.Example: A bike has wheels sized at 26in(diameter) x 1.95in(width)Step 1: 26in x 3.14=81.64in: 81.64in x 2.54 = 207.3656cm (Converting inches to centimeters 1 Inch =2.54 Centimeters)Solution: Tire Circumference = 207cmThen you need setup the wheel circumference to 207.Colour:BlackMaterial:plasticSize:105x41mmPackage Contents:1x Bicycle headlight code table1x Bicycle TaillightsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.