Lumbar Support with Massage Obusforme Black(Side to Side) Jobst Ulcercare It's a great gift 01804 It's a great gift to your friends who love sports and to the elders who need health care Includes Device batteries lead wires 1 4pack of electrodes carrying case and users manual * Channel: Dual Channels Isolated between channel * Output Maximum 130 mA (peak value) across 500 Ohm load * Pulse Width From:50 ÊS to 250 ÊS adjustable * Pulse Rate:2 Hz to 150 Hz Adjustable * Wave Form:Symmetrical bi phasic rectangular Monophasic rectangular * Operates on 2 AA batteries (included) * Timer Black * Superior lumbar support provides comfort wherever you sit * lightweight and portable * Enhances overall posture * Includes soothing massage * Use together with any Obusforme Backrest * Use it at home in the car or at the office * Item measures 16´ L x 10Û W x 4´ H * Uses 2 AA batteries (not included)