Check the listing for details. Jolly Logic Chute Release JOL CR1. Condition: New. Listed at 139.99 USD. Jolly Logic Chute Release JL CR1 Chute Release is a small electronic device that holds your rocket parachute closed until it drops to an altitude that you choose. This is great for windy days and small fields when normally your rocket would drift too far while descending under parachute. Simply wrap the elastic around your folded parachute and snap it into the other side of the release, then set the altitude (from 100 to 1000 feet (30-300 meters) and you are ready for launch. Specifications Size 54 x 31 x 10 mm (2.1 x 1.2 x 0.4 in) Weight 17.5 g (0.6 oz) Minimum Altitude For flights higher than 200 feet (60m) above ground level Release altitudes 100, 200, 300, 400, 500, 600, 700, 800, 1000 feet (30, 60, 90, 120, 150, 180, 210, 240, 300 meters) Rocket requirements Requires the use of motor ejection, and enough space for Chute Release and parachute, at least BT-60 1.6″ (41.6mm) diameter tube. May work in some 38mm rockets. Battery Rechargeable Li-Po battery and USB charging cord included.