About A:
Feature:
Small size and high quality. 
The base is detachable for easy installation.
Easy to install, the lower four-sided baffle of the switch can be removed and installed.
High current switch; the instantaneous current can reach 1000A, and continuous current 275A.
Can be used for RV, motor yachts, etc.
Specification:
Continuous current: 275 Amps DC
Intermittent current: 350 Amps DC
Starting current: 1250 Amps DC
Maximum voltage: 48V-60Volts DC
Dielectric Strength: 1500VAC/1min
Application: cars, RVs, yachts, trucks
Package Included:
1x Battery Selector Isolator
About M10 Battery Switch:
Features:
100% brand new and high quality
Color: Shown in the pictures.
Material: Plastic & Metal.
Size: Approx. 5.5 * 5.5 * 7cm/ 2.2 * 2.2 * 2.8 inch (L*W*H).
Round disk diameter: 58mm.
Round disk pitch: 38 mm.
Feet Spacing: 35 mm.
Screw Thickness: 10mm / 0.4in
Height: 71 mm (no key).
Overall height: 110 mm (with key).
Max. withstanding current of this battery switch: 12V/24V 100A-400A.
The key can be taken down when there is no power connection.
In this way, power supply will not be viciously switched on.
Waterproof cover can better protect key hole.
Package Includes:
1Pcs * Car Battery Switch