BSIDE MS6812 RJ11\u0026 RJ45 Telephone Line Cable Tracker Including Transmitter\Receiver This product ships according to the color or size of the main image on the product page. Product description: This set of tools can be used for the installation, inspection and maintenance of various cable lines. For telephone lines, various statuses of the telephone lines during operation can be judged, which makes the installation, debugging and maintenance of the telephone lines more convenient. It works in a way that does not damage the insulation of the cable. The kit includes a transmitter (transmitter MS6812-T) and a receiver (receiver MS6812-R). Features: 1. Determine whether the cable line is continuous. 2. Trace the cable route and locate the break. 3. Receive the audio signal from the cable (telephone line). 4. Determine the status of the working telephone line (idle, ringing, off-hook). 5. Send a single-tone or two-tone signal to the target cable line. Technical parameters: 1. Audio signal: 1.5KHz. 2. Receiving frequency range: 100Hz-300KHz. 3. Battery power supply: 9V (6F22) × 1. 4. Receiver size: 238x43x26mm, transmitter size: 145x35x25mm. Packing list: Receiver x 1 Transmitter x 1 Instruction Manual x 1 Bag x 1. The YY team is dedicated to serving you and wish you a happy life