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
Suit for tube <2.5cm

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.
Suit for tube <2.5cm

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