we can supply Tone and probe kit Here are brief introduction of our company: Shenzhen Noyafa Electronic Co., Ltd. is professional manufacture factory of producting compositive collocation cable testers .We empolder ,design,product and sell all tools by ourselves.we with plucked up domestic network products brand with hisself task ,in order to reduced client using cost tenet.It introduce into has advantage external manage pattern . 1. Trace telephone wire/LAN cable; 2. Trace wire in electrical system; 3. Verify LAN cable condition; 4. Continuity test; 5. Low Battery Indication; 6. Bright white LED flash light. 7. Cable Assignment Test: Open, short and cross of LAN cable, 2-wire (RJ11)/4-wire (RJ45) Telephone cable 8. Cable State Testing (2-wire) : a. Line DC detecting and anode, cathode determination b. Ringing signal detecting c. Open, short and cross testing