Tentacle R01-5 is a Battery Replacement Kit with 5 batteries for the Tentacle SYNC E (mk1/mk2) Timecode Generator. Note: Please do not buy this product in large quantities in stock, because the shelf life in stored condition is only about 6 months.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.