Escort External Speaker for Radar Detectors Mounts easily within vehicle. Must be wired directly to 12-volt power source. Useful for models: 9500ix, 9500i, 8500 x50, 8500, SRX, SR7, Solo S2, RedLine Convenient external speaker for radar and laser detectors Broadcasts audio alerts louder and with better clarity Ideal for drivers in loud environments or people with poor hearing Compatible with Passport 8500 X50, Solo S2, and Passport 8500 models Must be wired to 12-volt power source; 2.25 x 2.25 x 2.25 inches (W x H x D)