Features: Head Light: 3 operation modes: Normal, Slow flashing,Fast flashing Length: 10cm Diameter: 3.2cm Material: Plastic Weight: 40g Powered by 3pcs AAAbatteries (not included) Water Proof, Work under any weather Multi-functional: Bike light, Torch, etc Rear Light: 5 Red LED Rear Safety Flashlight Water Proof, Work under any weather IC controlled steady on and 7 different flashing modes Adjustable inclination with elastic head strap. Quick release bracket Rear light: Up to 150 hours operation with 2 x "AAA" batteries (Not included) It Will Be Easier If You Take Off The Red Part from The Left or Right Side. Bicycle Speedometer: Features: This is a great tool for its price. This Bike Computer Odometer Speedometer has many useful functions. It is also very durable considering even you have put over 500 miles on it, you even don't have to change the battery. It is functioned as tracking your training progress in real time. Easy operation and durability make it popular with people. Generally speaking, with it, you can control your riding every moment. Functions: SDP : CURRENT SPEED ODO : ODOMETER DST : TRIP DISTANCE MXS : MAXIMUM SPEED AVS : AVERAGE SPEED TM : ELAPSED TIME CLK : CLOCK (12H/24H) SCAN "+""-" COMPAPATOR SETTING SPEED SCALE(KM/H.M/H) SETTING TYRE CIRCUMFERENCE:(0MM-9999MM) FREEZE FRAME MEMORY AUTO : ON/OFF Specifications: Size (Computer Console): 4.5 x 4 x 1.1 cm Size (LCD Display): 3 x 2.5 cm Sensor Cable Length: 85cm. Powered by: 1* AG13 battery(included) Color: Black + Red Note: Sensing distance of the probe and the magnet holder 5-10mm Package Included: 1 x Bike Head Light with Quick release bracket 1 x Rear Safety Flashlight with Quick release bracket 1 x Bike LCD Bicycle Speedometer