ULW – 1/Pair = (2) Universal, Compatible Lead Wires. These lead wires work with the TENS device model ZZAN602. We sell these high quality, compatible lead wires BELOW WHOLESALE COST because of the modest positive margin on the shipping. DOES NOT FIT EMPI DEVICES – DOES NOT FIT PROSPERA DEVICS! Ships within 24 hours including weekends if humanly possible.