Application: the family use、personal use、outdoor use、eye massagers、beauty、relief eye fatigue and sleeping help、use in any place and any time\n\n\nmodel no.: fs-701\npower supply: dc 9v battery\noutput power:0~10vpp±10%\npulse frequency: 100hz\ncontraction time: 0.8s±10%(fast) 1.6s±10%(slow)\nslack time: 0.8s±10%(fast) 1.6s±10%(slow)\npower consumption: 0.9w\noutput intensity: 0~9hz\noutput current: 0.9w\ndimension: 46*31*132mm\ncontent inside: specification、main engine、9v dry battery、output lead wire