Garmin Fishfinder 300C

Physical & Performance:
Unit dimensions, WxHxD: 4.5 " x 4.5 " x 2.4 " ( 11.4 x 11.4 x 6.1 cm)
Display size, WxH: 2.1 " x 2.8 " , 3.5 " diagonal ( 5.3 x 7.1 cm, 8.9 cm diagonal)
Display resolution, WxH: 240 x 320 pixels
Display type: QVGA
Weight: 9.6 oz ( 272 g)
Waterproof: yes ( IPX7)

Features & Benefits:
Audible alarms: yes
Dual-frequency sonar capable: no
Dual-beam sonar capable : yes
Split-screen zoom: yes
Ultrascroll® ( displays fish targets at higher boat speeds) : yes
Fish Symbol ID ( helps identify fish targets) : yes
AutoGain Technology ( minimizes clutter, maximizes targets) : yes
Whiteline ( indicates hard or soft bottom) : yes
Adjustable depth line ( measures depth of underwater objects) : yes
A-scope ( real time display of fish passing through transducer beam) : no
Bottom lock ( shows return from the bottom up) : yes
Water temperature log and graph: yes
Water temperature sensor included: yes
Water speed capable ( displays speed on water) : yes

Other:
Frequency: 80/ 200 kHz ( dual beam)
Transmit power: Dual Beam, 150 W ( RMS) , 1, 200 Watts ( peak to peak)
Voltage range: 10-20 VDC
Maximum depth: 900 ft ( dual beam)
 Cone angle: 45° or 15° ( dual beam)