These mains power supply units are enclosed in metal cage, tested and guaranteed to be working worldwide (100V-240V / 50-60Hz).  Output voltage is adjustable in limited range with an on-board trimmer.

Each power supply also requires mains cable, which can be purchased locally (each country has a different mains plug and we don't carry them all). They are easy to obtain and are very cheap (about 1US$).

Technical specifications:
- AC Input: 100/120/220/240 VAC + or - 10%. (47 to 63Hz).
- Output Ripple: 10mV, +0.1% Of Output Voltage Max.
- Stability: 0.1% For 24 Hours After Warm-up.
- Temperature Rating: 0deg. C Full Rated, Derate Linearly To 40% At 70~ C.

Output current and voltage: Depends on model, see product name below.