User Manual October 22, 2023 20:50 Each Livia Kit contains an English user manual. Related articles Livia didn’t work for you? Try this tips: Is Livia a TENS unit? OTHER areas of PAIN Livia Gel Pads are made of hydrogel which is created by a unique polymerization technology. It is a high-function, highly-safe raw material. Water and electrolyte are stably maintained in a hydrophilic resin matrix.