1: Widely used 2: Low pressure alarm function 3: Withstand high voltage and high current 4: Convenient and easy-to-operate external installation with shell. 5: The maximum current of 350A specification can reach 500A. Note:due to different production batches, the display interface of coulometer is randomly sent out, and it does not accept the designation. The function is the same and it does not affect the use. TF03K Coulomb meter the maximum use can reach 120V Function display: 1: Battery percentage 2: Capacity display 3: Time display 4: Voltage display 5: Current display 6: Power display 7: Low pressure alarm Colour:Black & Gray Material:ABS Size:100x61x17mm Package Contents: 1 x Display table 1 x sampler 1 x 1M shielded wire Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.