Advantages include:

Tube-based system eliminates costly resourcing and loss of speed
Single-element analysis - ideal for Lead (Pb) checks
Definitive Pos./Neg. Classifications

No isotope licensing or travel restrictions
Ergonomic, lightweight design
Versatile PDA platform.
Easily measures uneven surfaces

Specifications

Weight 2.625 lbs. (base wt.) 3.375 lbs (1.6 kg) with batteries
Excitation Source X-ray tube, Ag anode, 10-25 keV, 10–50 µA
Detector Si PiN diode detector, < 300 eV FWHM at 5.95 keV Mn K-alpha line. Temperature Range: -10°C to +50°C
Temperature Range -10∞C to +50∞C.
Power Requirements Li-ion batteries, rechargeable (charger included). Powers analyzer and iPAQ simultaneously. AC Adapter optional