Walmart offers the Straight Talk Remote Alert System, model no. STREAX54NCPWP, for $57.87 with free shipping. That's $72 off and tied with our mention from last week as the lowest total price we could find. It's compatible with Straight Talk Remote Alert service plans and provides call alerts to five pre-assigned numbers, text alerts to three pre-assigned numbers, and remote arm and disarm functions via the Android or iOS smartphone app. It includes a wireless controller and motion sensor.