Narco UDI-4 Interrogator 14-28V Installation Manual (3304-624) by Narco Sale $14.00 | / SKU 2199:R Printed Manual - $14.00 Download - $14.00 Printed Manual Download Size 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart This item is a recurring or deferred purchase. By continuing, I agree to the cancellation policy and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted. Distance Measuring Equipment