The extra programming is just the I think its called c programming d1sc they gave with the early ER1's and than tried to sell it to us.I have to complete ER1's one with all the extras sensors, arm, and one basic set up with 2 extra batteries.Really just looking for a fair price for both. I bought them when they were pricy but than prices dropped. People can email me if interested at ron222@earthlink.net