Wire specification: 28AWG, 3-core wire / 7 0.12/OD4.8MM (cold resistant with tension wire: not easy to break). It has a round five pin connector at the end of the attached cable. Wire: 22AWG, 5-pin 4-core wire / 17 0.16/OD5.0MM (personalized wire optional: 01+ large D5P female plug).