The Whistler XTR-445 has an improved red OLED text display that provides better contrast, brightness and color. It shows alerts detected, engaged modes, and digital signal strength in text format (i.e. HIGHWAY or Ka9). Another feature of the XTR-445 is traffic flow signal rejection (TFSR), which helps eliminate alerts from radar based traffic flow sensors. The rechargeable NiMH batteries in this device provide hours of use without the need for a power cord. There is also an internal battery charger that recharges the NiMH batteries in the unit when plugged into a functioning 12V socket. Advanced speed detection capability responds to brief bursts of radar in the POPT Detection Mode.