A palm sized Wireless Bluetooth Datalogger with: 6 USB ports for webcam and sensors 8 analog ports for 5 VDC sensors Over 70 sensors available form various makers (see sensor list) Instantly capture data trends and video on iPhone, iPad, Android phones and tablets. Ideal for classrooms and labs. Instantly email the data as a csv file from your mobile device. Download the apps for free from Apple Store and Google Play. Connect a charger or battery with 5 to 15 VDC and a 5 mm, DC connector with 2.1 mm center pinGreen Energy Research