Power Source

4 AA Alkaline/Ni-Cad

4 AA Alkaline/Ni-Cad

Field Replaceable

Yes (batteries not included)

Yes (batteries not included)

Life Transmission Time

At 15% transmit, 4 full hours (dependent
on battery quality and water temperature)

At 15% transmit, 4 full hours (dependent
on battery quality and air temperature)

Low Power Indicator

Yes (audible)

Yes (audible)

Operating Temperature

-10⁰and 50⁰C

-10⁰and 50⁰C

Water Activated On/Off

Yes

No

Intelligent Power Management

Yes

Yes

Dual Speakers

Yes

Yes