Feature:  

• About 30 hours of battery life (non-replaceable)  
• Bowstring Activated On-off Switch  
• Waterproof and shock resistant  
• High- Visibility LED, no assembly required.
• Light weight and precision-balanced for superior accuracy.  
• String activated on-off switch.
• Color: Green / red / blue
• Weight: 30 grain  
• Material: Clear plastic + LED stick      

After the battery is weak batteries do not throw away, put some time and can be a few hours,

so again, the power completely used up, individually sealed storage battery can extend the battery life.

Specification:

Fits for bolt size 0.297"-0.302"(7.6mm) ID
Quantity: 6pcs (6pcs in one box)