istim ev-805 tens ems 4 channel rechargeable combo machine unit - muscle stimulator + back pain relief and management- 24 programs/backlit (including electrodes pads) istim <b>istim ev-805</b> is your ultimate solution for pain relief. it features <b>4</b> channels, <b>5</b> tens modes, <b>3</b> ems modes, <b>24</b> preset programs and <b>rechargeable</b>. just follow the manual and quick guide, then every user can be clear about this machine and incorporate it into your daily life without any problem <br><br> <b>istim ev-805</b> is the highiest level model of istim series, and it's the high-end one for the experienced user and the 4 channels can let the user use 8 pieces electrode at one time. <b>istim ev-805</b> has lots of modes and functions, but it's be designed easy-to-use, so even the new user can use it without any problem. <br><br><b>istim ev-805</b> includes istim ev-805 x<b>1</b>, electrodes pads x<b>24</b> (including 3 types: 2"x2", 2"x2"(black), 2"x4"), lead wires x<b>4</b>, instruction manual x<b>1</b>, quick guide x<b>2</b>, sealable bag x<b>2</b>, usb charger and lead x<b>1</b> and carrying case x<b>1</b> <br><br>the <b>5 tens modes</b> include <b>burst</b>, <b>normal</b>, <b>modulation</b>, <b>sd1</b> and <b>sd2</b>. the <b>3 ems modes</b> include <b>contant</b>, <b>synchronous</b> and <b>alternate</b>and the special mode includes (<b>p1~p24</b>)(<b>p1~12 - tens</b>, <b>p13~p24 - ems</b>), please refer to the quick guide to use the proper program on the proper postion. besides, large liquid display(<b>backlit</b>) showing the mode name and all settings is ideal for users to check the setting at any time <br><br> <b>pulse amplitude</b>: adjustable, 0-100 ma peak into 500 ohm load <br><br><b>wave form</b>: asymmetrical bi-phasic square pulse <br><br><b>pulse rate</b>: adjustable, from 2 to 150 hz, 1hz/step <br><br><b>pulse width</b>: adjustable, from 50 to 300 microseconds(μs), 10μs/step <br><br><b>timer</b>: adjustable, from 5 to 60 minutes or continuous. <br><br><b>battery</b>: lithium battery(rechargeable)<br> <br><br><b>#do not use extra electrode gel with electrode pads</b>