We recommend a minimum two day rental, therefor you can get familiar with the equipment. Followed up with the investigation and then allow time to download your video and/or audio files. Currently we have a 4 day maximum rental length. Batteries are included, but we recommend you have extra’s on hand because certainly you know how entities like to drain power from devices. Our inventory is limited for now until we see what the demand is over the next few months. Suggestions on what we should add to our inventory is encouraged. Please allow enough time for shipping. We will pay for all return shipping, a return label will be included with your order. The contact page can be used to give us feedback.