[Super Long Transmission & Ultra-Stable Signal] 12 volt wireless camera new upgraded 2nd generation digital wireless with 100% NO interference. The trailer backup camera signals stay smooth and clear when the speed reaches upto 85 mile, making you more assured and safe to drive. The wireless working range is over 1600ft/500m in open area. The rear View Cam System comes with a 6-layer full HD lens, and automatic night vision IR light, which renders clear and high quality picture [Multi-channel DVR Recording System] The backup camera system kit comes with front & rear view camera and multi-channel simultaneous HD video recording. Hd backup camera system will generate separate video files for each camera (.avi format and 1024x600 resolution); With loop recording: automatic deleting previous files when the memory card is full. Max Card Memory Support Upto: 128GB (NOTE: Memory card is NOT included in the package)