Physical & Performance:

Unit dimensions, WxHxD : 5.7" x 5.0" x 2.7" (14.5 x 12.7 x 6.9 cm)

Display size, WxH: 2.4" x 3.2", 4.0" diagonal; (6.1 x 8.1 cm, 10.2 cm diagonal)

Display resolution, WxH: 240 x 320 pixels

Display type : QVGA

Battery : no

Life of battery : no

Waterproof : yes

Antenna : build-in

NMEA input, NMEA 2000 output

Cards and memory :

Basic card : yes

Build-in card : no

Memory card type : SDtm / not included in the box /

Memory favorite destinations : 1500

Route memory : 20

Track memory : 10 000 points, 20 saved tracks

Others :

Compatible with Garmin radar : no

Compatible with Garmin sounder : no

CANet compatible : yes

AIS : yes

DSC : yes

Sound alarms : yes

Tides table : yes

Calender for hunting / fishing : no

Information for the sun and moon : yes

3D card : yes

In the box : GPS MAP 421s, mounting cradle, safety cover, Power/data cable, Quick start manual, Dual