Check the listing for details. TenPoint Alpha-Brite Lighted Nock, 3 Pack (Red). Color: Red, Condition: New. Listed at 43.62 USD. 3 piece, Alpha-Brite Lighted Nock System begins with a Nock-Receiver insert with a 6 sided interior cavity designed to accept a combined LED unit and translucent pegged Alpha-Brite Nock. Nock Receiver is glued into the nock-end of the arrow and indexed with the vanes. To deactivate the Alpha-Brite system, remove the nock and LED unit, and pull the lighted end of the LED unit until the light turns off. LED unit’s battery should last for approximately 8 hours. Includes 3 pack of Alpha-Brite Red Lighted Nocks 3 piece, Alpha-Brite Lighted Nock System begins with a Nock-Receiver insert with a 6 sided interior cavity designed to accept a combined LED unit and translucent pegged Alpha-Brite NockNock Receiver is glued into the nock-end of the arrow and indexed with the vanesTo deactivate the Alpha-Brite system, remove the nock and LED unit, and pull the lighted end of the LED unit until the light turns offLED unit’s battery should last for approximately 8 hoursIncludes 3 pack of Alpha-Brite Red Lighted NocksWARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.