'- Displaybacklit LCD and glow-in-the-the dark keypad- DataSafe Prosuperior high-impedance monitoring, lockout and override, making you completely safe in any mode- DropSafepasses 20-foot drop test- DSL/POTS Filtering Technologyallows technicians to clip on a live DSL line to test POTS service without downing or disrupting data service- RainSafedesigned for use in rain conditions- 2-way hands-free speakerphonefor true hands-free conversation- Test Functions- Data indicationwarns when data is present Voltage indicationtroubleshooting feature to identify potential line problems- Current (mA) indicationverifies sufficient line current- Caller-IDverifies service is functional- DTMF Digit Grabbingisolate faulty customer premise equipment