High Tech Pet Humane Contain CRX-10 Battery Charger for RX-10 Multi-Function Collar Fully recharges the lithium ion battery in your Humane Contain RX-10 multi-function collar in about 3 hours Collar snaps into the charger station LED changes color to let you know when your collar is fully charged Can be wall-mounted or used free-standing Auto shut-off prevents over-charging