710-125A-DS (Dual Sense). Added feature of dual sensing. This allows the unit to sense the voltage of both batteries that it is connected between. If either battery. is receiving a charge the VSR will activate paralleling the two battery banks. The 710û125AûDS is designed for situations where a battery charger or second charging source is used into the house battery. Specifications: Continuous current: 125 Amps. Intermittent current: 150 Amps. Ignition Protected UL1107. Dimensions: 69L x 69W x 50H mm. 2.7L x 2.7W x 2H inches.