What's in the box:

Bike Stem Mount Computer Holder Support for Polar M450/V650 GPS Cycling Computer 1-1/8" Bike Stem Mount (Black)

The stem mount is designed for Polar M450 V650 GPS computer,1-1/8" diameter & 5mm height stem mount, it cantightly attached to your bike. Made of CNC-machined aluminum,durable and strong, ideal for mountain bikers.

Features:
Designed for Polar M450 V650 GPS computer.
1-1/8" diameter & 5mm height stem mount, tightly attached to your bike.
You can adjust the angle of the mount, easy to use.
Made of CNC-machined aluminum, durable and strong enough.

Specifications:
Material: CNC Aluminum + Plastic
Compatibility: for Polar M450 and V650
Item Size: 8.5 * 3.6 * 1.4cm / 3.35 * 1.41 * 0.55in
Item Weight: 26g / 0.92oz
Package Size: 10 * 8 * 1.5cm / 3.94 * 3.15 * 0.59in
Package Weight: 54g / 1.90oz

Package List:
1 * Stem Mount
2 * Hexagon Wrench
1 * Hexagon Screw

Note:
Bike computers are NOT included.