Mark Invader 23 Make Mark Model Invader 23 Catalog # 2305 Channels All 23 channels. Freq Range 26.965 - 27.225 Mhz Power Output 3.5 Watts Power Input 13.8 Volts D.C. Dimensions 2-1/2 x 8-3/4 x 9-1/2" Weight 6 lbs Mark Invader 23