... , RJ45, Cat 5e, Cat 5, 10/100 Base-T, AT&T 258 A, TIA-568A/568B .etc Lan network cable tester RJ11,RJ12 ... circuitCable Tester for RJ12, RJ11, RJ45, Cat 5e, Cat 5, 10/100 Base-T, AT&T 258 A, TIA-568A/568B .etcIt ... switch for power savingPower: 9V battery ( Not Included )Size: 100 x 100 x 25mmWeight:124g Lan network cable tester RJ11,RJ12,RJ45 cat5e