ECO-WORTHY: Bluetooth Real-Time Monitoring; Low-Temperature Charging Protection ; 10-year life & Up to 15000+ cycle; It involves up to 4 identical batteries for connection in series and unlimited batteries in parallel.; Lightweight & Easy Installation; BMS Comprehensive Protection; Suitable for Trolling motor,RV, Caravan, Marine, Boat, Overland, Backup power supply and Off Grid Applications.