The thing on his belt is a Danelectro Honeytone mini-amp. They sell the same model just down the road from my house.
http://www.harmony-central.com/Guitar/Data/Danelectro/HoneyTone_Mini_Amp-1.html
http://www.harmony-central.com/Guitar/Data/Danelectro/HoneyTone_Mini_Amp-1.html