2. Fits: compound bow, carbon shaft, fiberglass shaft,
3. size: inner diameter 6.20mm
4.weigh only 20 grains TOTAL
5.they can be seen for hundreds of yards and the battery lasts up to 48 hours
6.size: S
After
the battery is weak. Please do not throw away, After a period of time,
It can be a few hours again work, Until power is completely off.