Whistler PI-400W 400 Watt Power Inverter Whistler Radar (21) Buy new: $79.95 $24.81 27 used & new from $24.81 (Ranking is updated hourly. Visit the Bestsellers in list for authoritative information on this product’s current rank.)

The rest is here: 
#8: Whistler PI-400W 400 Watt Power Inverter