Check the listing for details. EXFO MAX-890-ETH-100 MaxTester Handheld Multi-Service Unit Tester; 100G. Condition: Used. Listed at 18500.00 USD. MAXTester 890: 10M-to-100G Multi-Service unit. Electro Rent will withdraw in case of failing security screening. Electro Rent warrants that Electro Rent owned standard Software substantially conforms to Specifications.