1st generation Jetson Bolt's have a black rear hub motor and a red trim on the tires. The 1st generation Bolt is not Bluetooth enabled.
2nd generation Bolt's have a black rear hub motor and a green trim on the tires (See above). The 2nd generation Bolt is Bluetooth enabled.
3rd generation Bolt's have an orange colored rear hub motor and orange accents on the seat and bike stem. The 3rd generation Bolt is Bluetooth enabled.
4th generation Bolt's have a red rear hub motor (see below). The 3rd generation Bolt has a bell instead of a horn. The unit is Bluetooth enabled.
