The Impulse 7010 selectable load box is a unique, robust and easy-to-use tool which provides the capability to test defibrillators under a variety of patient impedance conditions to ensure patient safety and is the perfect companion to the Impulse 7000DP. It replicates all patient transthoracic impedance loads from infants to overweight adults and simulates user-selectable impedances as high as 200 ohms accurately.