The X2 1700 takes the light output up from the Alpha while still using the same battery packs.  More light power (1700lumen) gives a slight weight increase of 89g for the headlamp and burn time is a little less at 1.5hr with the 2cell battery. But you do get the neat wireless remote that can turn on/off the light and cycle through settings - this is perfect if you a running the light on your helmet.

It comes with 2 default settings - Trail and Commute. The commute setting has an additional Special mode that gives a flash every 2 second. The Trail mode gives low/med/high and Super Dim . Special modes are activated by holding down the button, so no need to cycle through settings.

What's included

• X2 Headlight
  
• Wireless TX Remote
  
• Universal QR helmet mount
  
• Universal Light Mount
  
• 31.8mm QR handlebar mount
• Spare Optics (Spot/Wide)
• Smart Battery Charger
• 3400mAh Lithium Ion 2cell battery
  
• Hex Tool