AQ4000 Meter with 4 AA batteries, 16mm vial, zero vial kit, 13 and 16mm vial adapters, field case, user guide, tablet tamping stir rod, and vial cleaning brush AC2V16 Replacement 16mm vials, 10/pack AC2V24 Replacement 24mm vials, 12/pack AC3CBR Vial cleaning brush, 5/pack AQ4CBL RS232 cable for data download and software update AQ4ZER AQUAfast