AT-100 smoke machine
4 Channel Oscilloscope Kit II (USB) & kit IV (built-in Wifi)
HDL100 refrigerant leak detector

Description
Features
- Microprocessor control, with Advanced Digital Signal Processing
- Dual color LED visual display and audible alarm
- 7 levels of adjustable sensitivity
- Battery Test function Battery voltage indication. More than 50 hrs in normal detecting status.
- Cordless and portable, operate on 2 Alkaline batteries
- Probe length 36 mm