Measuring voltage range: 0~420V (when measuring Less than 10V, the meter needs to be powered independently) Measuring capacity range: 0~99999AH Curve function: Dual parameter curve can be paused/run Host charge and discharge column statistics: daily/monthly/yearly report WiFi networking/Bluetooth connection: support HID computer connection: support Four standby styles: support Firmware upgrade: WiFi networking upgrade/host computer HID upgrade Peak record: support (The product printed words may vary depending on the batch, but this does not affect use) Specification: 30A / 100A Color: As shown Material: plastic<br><br>Package Contents: 1 * Battery Capacity Tester 1 * 80A Relay 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.