1000 Amp Probe Digital Multimeter High quality unit with 37 test ranges and 10 testing functions - high current capability, good for starting/charging diagnostics . Auto power-off, Auto-ranging, Data Hold - Built-in Temp readings . Temp probe and carrying case included - full function Digital Mutimeter built-in . Clamp opening 1.5 inches - good choice for heavy-duty troubleshooting . Backlit LCD display . Great tool for all around electrical troubleshooting. . The ESI655 is ideal for all high current applications, especially starting and charging diagnostics. The ESI655 can measure up to 1000 amps AC or DC. Unit features built-in degrees F or C temperature readings 655 Prop65 information pending -