Ant	GPS Antenna: High Performance GPS Antenna for harsh RF Environments.
B	Parallel BCD Output: CMOS compatible, 5-volt logic in parallel four-line format. Specify the ES-169B.
BBU	Battery Back-Up: An internal Gel-Cell battery is provided capable of maintaining the unit's microprocessor for up to a 4-hour power outage.
DC	DC Operation: Requires the unit to be powered from a DC source exclusively, typically +12 to +35 VDC.
EX10	External Time Base: Available when a user prefers to reference the clock of an existing source of 10 MHz.
K	Provides a 10 MHz output and a phase lock 1PPS signal.
MG	Multi-GNSS: Provides a Multi-GNSS Receiver capable of tracking multiple Global Navigation Satellite Systems.
OCXO	OCXO: Provides an Oven Controlled Crystal Oscillator.
UL	"UL" Approved Power Supply: The unit is supplied with a UL/CSA approved wall mount power supply (90-264 VAC).