Additional Details ------------------------------ Product description: Two high-quality Tens electrode lead wires to double the pads you can use with your Tens device. These durable lead wires each use the standard (headphone size) 3.5mm plug to FOUR 2mm pin connectors. Note: Make sure that your device uses the 3.5mm standard headphone size plug. If your device has the smaller 2.5mm port, we offer these on Amazon as well. Used for electrode pads that accept the industry standard 2mm pin connector size. This lead wire is compatible with all TENS / muscle stimulator devices that use the industry standard 3.5mm headphone size plug. EliKing HealthmateForever HiDow IQ Massager Irest iSmart Magic Massage Magic Masseuse MassagePod Palm Massager Pinook Smart Relief And all others that utilize the standard 3.5mm plug.