TENS machine can be used to reduce pain associated with arthritis, muscle pain, labour, sporting injuries and much more*. It also promotes increase blood flow and muscle strengthening. 
A rebate is also available from most Private Health funds. 
A regular TENS with adjustable pulse width, pulse rate, intensity, modes and an accurate timer of 15, 30 and 60 minutes, will stop output at pre-setting time.
  Features:
    Channel: Dual, isolated between channels
Pulse Amplitude: 0-80mA peak to peak into 500ohm load
Pulse Rate: Adjustable, from 2Hz ~ 150 Hz
Pulse Width: Adjustable, from 30uS ~ 260 uS
Mode: B, N, M Timer: Selectable, 15, 30, 60 Minutes (or 15, 30, constant)
Wave Form: Asymmetrical Bi-Phasic Square Pulse
Voltage: 0-40V peak into 500ohm load
*Please consult wit your healthcare professional before using this item if you have any pre-existing medical conditions or are pregnant