Product Name: SML-868TS (white blue black three colors for your choice) Patent No.: ZL2007300 Advantages: ● operation simple sleek ● light sound of double effect ● flexible and versatile interface ● to find measured optional dual effect ● streamline type easy to carry ● noisy occasion the headphones ● stable and reliable energy saving ● main functions: ● the hunt function ● measuring line function ● line state detection range of applications: ● telephone network line engineering ● computer network line project ● other metal wire line project Reliability: reliable operation, anti-interference ability, switch the live hunt Features: the characteristics of the line features: quick test line open and line sequence. hunt: Among the many lines in fast find need a pair of lines, hunt length of up to 3,000 meters; sensitivity adjustment function: when used according to the need to adjust the volume 5. headset features: in a noisy occasions, wearing headphones Product Description : Operating Current: Emission current ≤ 20mA, receive current ≤ 50 mA Power Specifications: DC 9V superposition battery Signal distance: transmission distance up to 1-3km safety performance: use a secure (the probe can be in direct contact with bare metal wire.)