Daico 100D0809 Series. Attenuator. Specs unknown. Relative test measurements, First display image shows unattenuated state 500 KHz to 50 MHz, Second image shows max attenuation from 500 KHz to 50 MHz, Third image shows results up to 1 GHz. Not quite flat up to (and beyond) 1 GHz. Tested only as shown, sold as-is as-found for parts or repair. No return