Garmin Reactor 40 Mechanical Retrofit Solenoid Corepack w o Display [010 00705 48] Decked waterproof shell is constructed of 1069015498 P812A231S3 waterproof shell is constructed of PU coated 840D nylon material 0 oz (284 g) (with collar) Battery Type Rechargeable lithium ion (user replaceable) Battery Life 20 40 hours per charge Range Up to 9 miles Water Rating 1 ATM (10 meters) GPS GLONASS Receiver Yes (high sensitivity) Stimulation Tone Vibration Yes LED Beacon Lights Yes (remotely controlled) Rescue Mode Yes Replaceable Collar Straps Yes (1” wide) Neck Size Compatibility Minimum 9 you can have full control of Reactor 40 from wherever you are on the boat Reactor™ 40 Mechanical Retrofit Solenoid Corepack without GHC™ 20