Tentacle R01 is a Battery Replacement Kit for the Tentacle SYNC E (mk1/mk2) Timecode Generator. Please note: This kit is for Tentacle SYNC E units that are outside the 2 year warranty. If your device has battery problems within the warranty period, please contact Tentacle via Repair Request prior to purchase.PLEASE NOTE: This product contains Lithium-Ion Batteries. Due to FAA regulation this item is restricted to ground transportation in the lower 48 contiguous states and cannot ship to Alaska, Hawaii or Puerto Rico.