Amplifier probe Specification Frequency 1kHz Max. working current 70mA Function selection 4 Position mode switch (LEDNCVOFFSCAN) Earphone socket 1 Signal status indication LED & Buzzer NCV indication LED (AC 90~1000V) LED illumination Y Power indication LED x 1 Battery type DC9.0V (NEDA 1604/ 6F22 DC9V1pc, not include) Dimension(L x W x H) 230 x 56 x 25mm Weight 80g Accessory Storage bag x 1 Tone generator Specification Tone frequency 1kHz Max. testing distance 1.5km Max. working current 20mA Tone mode One / Two-note tone Compatible connectors De-energized AC wire, telephone/twisted pair wire, all voice Function selection TONE/OFF/CONT Continuity test 1 LED (10)Coaxial cable & solid/ stranded wire by alligator clips patch cord Max. signal voltage 8Vp-p LED indicator Power indicator x1, Phone line poliarity indicator x1, Phone line status indicatorx1 Live telecommunication equipment test and router test Y Voltage protection DC 48V Low battery indication 7V(Flashing power indication) Battery type DC9.0V (NEDA 1604/ 6F22 DC9V1pc, not include) Dimension(L x W x H) 65 x 58 x 34mm Weight 62g Features: Fast, accurate wire identification Rugged industrial design Sends tone to identify wires Three selectable tone outputs Two-line polarity indication Continuity test Adjustable volume control Visual signal strength indication Powerful speaker for noisy environments Recessed telephone test set connectors