Smart Sequential Road Flares (Rechargeable) Set of 64 flash patterns to choose from (2 sequential, 1 simultaneous, 1 steady burn) Automatic synchronization of flares; No programming, no pre numbering; turn on and deploy "Pair" mode system allows for single or multiple sets to be synchronized Preferred pattern, deployment order, and gravity activation mode settings are saved into memory for next deployment 20 22 hour runtime 4 5 hour recharge time from a completely depleted battery IP67 Water and Dust