MRC:
Those unusual or unique characteristics or qualities of an item not covered in the other requirements and which are determined to be essential for identification.FEAT
Special Features:
Rx audio input impedance: unbalanced, 80 ohms ; frequency response: 280 hz to 3400 khz; tx audio output impedance: unbalanced, 1000 ohms ; open circuit voltage: 60 vdc; internal, rechargeable battery/charger: lithium ion, 7.4 v/1.0 a, 3 hour/full charge (ambient temp dependent); weight: 3.0 lbs, without adapters and accessories; size (h x w x d): 1.75 x 8.4 x 8.0 inch excluding control panel connectors/switch protrusions; operating temperature: negative 20 to 60 degree celsius; storage temp: negative 40 to 80 degree celsius