J+J Battery 'Spring' Return Conversion Kit J4CSBSR1

J+J BSR Battery Backup Plug-in to Suit Models 20 to 85, J+J Features: Battery 'spring' return kit for the J4CS electric actuators. Can be set to fail open or closed (please specify). Can be retro-fitted to existing J4CS actuators. Also comes complete with installation instructions. Rechargeable NiCd battery. Both the BSR and DPS kit can be installed together to provide failsafe and modulating functionality.