Harmony GTU

Missing one of the plastic legs

Has some marks and discoloration due to usage

Includes: RA5852907 RA5873908 RA8111806

Max temp: 250°C

Prolon Control Systems PZM4148-M PCB125/4 Lonbox 2-Zone Default:DefaultVariant Harmony GTUHas broken connector. Missing service test reset buttons. Refer to photos. Comfort + Light Controller Neuron ID: 0498CCB60200. The support for multi function switch buttons based on resistor networks available in software version 3 and later requires revision M hardware. The PZM4148 is marked PZM4148 M on the type label. All other functionality in the new software versions are fully compatible with the older hardware revision and the software can be