AMB 260 Transponder, wireless, doesn't require subscription. It needs a battery replacement. Was working around 3 years ago when I put it away and has been sitting since then. It will currently flash the green light while sitting on the charger, but will not hold a charge once you unplug it. There are several services on eBay and elsewhere on the internet that will replace the battery for around $50. Please research before you buy. Includes car and wall charger, no bracket. $200 or best offer.