Description:
The pressure of string will push the light touch the battery, then the nock will be lighted when you shooting!Then you can turn on  and turn off the nock directly like the packaging introduction picture(no Tool Required). 
Glowing arrow nocks, battery capacity can be used continuously 48hours, the actual use of the first three nights are very bright, the fourth night began to slowly weaken. 
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.
Suitable for both target practice and real hunting!

Feature:
Battery Life: up to 36 hours
Nock size: 7.62mm
Color:Green/Yellow/Red/Multicolor light
Quantity: 6/Pack
Type:For Crossbow

Fit for: Arrow shaft with inner diameter of 7.6mm mix carbon, carbon, aluminum arrow

Package include:
6/12/24Pcs Lighted Nocks