PD3129 / Hioki - Japan
- Voltage range: 3-phase 70 to 600V AC
- Clamp head diameter: 2.4mm to 17mm
- Positive phase detection: 4 LEDs light up clockwise and the speaker beeps intermittently
- Negative phase detection: 4 LEDs light up counterclockwise and the speaker sounds continuously

PD3129-10 / Hioki - Japan
- Voltage range: 3-phase 70 to 1000V AC
- Clamp head diameter: 7mm to 40mm
- Positive phase detection: 4 LEDs light up clockwise and the speaker beeps intermittently
- Negative phase detection: 4 LEDs light up counter-clockwise and the speaker sounds continuously

3481-20 / HIOKI
- Voltage range: 40V to 600VAC
- Frequency: 50/60Hz
- Display: red light when the wire is energized, beeping
- Battery check: bright white LED - dim when battery is low
- Auto power off after 3 minutes
- Power supply: LR44 ×3, continuous use for 5 hours
- Dimensions: 20×126×15 mm
- Weight: 30 g (including battery)