Item No NVK-5472 Protect Your Li-Po Battery Investment Now users of all models and brands of ESCs can appreciate and enjoy the advantages of Lithium Polymer (Li-Po) battery packs without the fear of damaging the cells. The Smart-Stop Li-Po Cut-Off Module will monitor your Li-Po battery pack voltage and prevent the batteries from going below the critical safety voltage level. This is achieved using a combination of throttle interruption and a visual cue from the included ultra-bright blue LED. The Smart-Stop Modules are available for 2-cell (#5470),3-cell (#5472), or 4-cell (#5471) Li-Po battery packs and can be used with any brand brushed or brushless speed control for car, boat, or air applications. For racers and bashers alike, the Smart-Stop Module will prevent your vehicle from draining your Li-Po packs below their safety level. The Smart-Stop Module connects between the receiver and speed control, and is easily set up with a One-Touch Set-Up button to learn the ESC's settings for accurate and complete control. The Smart-Stop Module will interrupt the ESC's throttle operation with short periods of throttle blipping. This is a warning that the Li-Po battery voltage safety level is approaching, giving the user a chance to bring in the vehicle. In addition, the remotely-mounted, ultra-bright blue LED will begin to flash, giving a clear visual cue that it is time to stop the vehicle. If the vehicle is run beyond this warning period, the Smart-Stop Module will bring the motor to neutral while leaving full steering servo control. SMART-STOP LI-PO CUT-OFF FEATURES AND SPECIFICATIONS Voltage Range: 2-cell (#5470), 3-cell (#5472), or 4-cell (#5471) Li-Po battery packs Low Voltage Indicators: Throttle Interruption (30 total) and Flashing Blue LED Size: 0.69 x 1.18 x 0.25 inches (17.5 x 30.0 x 6.4 mm) Weight: 0.4 oz. (11 grams) Voltage Cut-Off Point: 6.25 volts (#5470 2-cell); 9.375 volts (#5472 3-cell), 12.5 volts (#5471 4-cell) Voltage Monitor Accuracy: 1% Set-Up: One-Touch Input Harness: 9" with standard JR plug LED Harness: 6" replaceable harness with ultra-bright blue LED attached Battery Connection: 10", 20 GA Black & Red silicone wire ESC Connection: Standard 3-pin Product features and specifications subject to change.