One box: 50 units; box:28*44* 48cm

Features:
Wide range of applications: Circuit testers can be used to test continuity, test voltage polarity, check lights, check motors, track and locate short circuits, test for bad ground contacts, etc.
long test lead: Cable length is approximately 16 feet, allowing you to easily test any electrical system.
Short circuit protection: The unit has a short-circuit protection function that can instantly detect poor ground contact.
easy to use: After simply connecting the device to the vehicle's battery, an automotive technician can conduct the battery's positive and negative current to the tip by cranking the power switch forward or backward.
Comprehensive 6- 24V DC test kit: Do not use under AC voltage.

Instructions:
Unfold the cables of the unit
Attach the red clip to the positive terminal of the vehicle battery
Attach the black clip to the negative terminal of the vehicle battery

Specification:
color: red
Operating Voltage:6- 24V DC
cable length: 16ft
Overload protection: 8A( When the current exceeds 8A) , this item will automatically cut off the current.)
Package Size: 26.5* 9* 4cm
Package weight: 320g 

packing list:
1* Circuit tester