Welcome to our store! Multifunctional: Features include open/short circuit testing, phone line finding, cable tracking, DC level testing (DC 3~10V), network line finding, and network cable verification. Low Voltage Prompt: When the transmitter's function selector is in search mode, if the battery voltage drops below 6V, the transmitter's "SCAN" and "line sequence" LEDs will flash simultaneously to remind you to replace the battery. Headphone Function: Use headphones in noisy environments to block out external interference. Spotlight Function: Easily work in the dark with the built-in light switch. Adjustable Volume: Turn the receiver's volume adjustment knob (higher volume means higher sensitivity) until the sound is comfortable. Energy Saving: Automatic delayed shutdown. The device will automatically enter standby mode approximately 1 hour after startup. Specifications: Product Name: Network Line Finder Product Model: M469A Battery: 6F22 9V battery (not included) Interface End: RJ11, RJ45 Transmitter Size: 127 x 56.5 x 30 mm / 5 x 2.22 x 1.18 inches Transmitter Weight: 62g / 2.19oz Receiver Size: 198 x 46 x 31.5 mm / 7.79 x 1.81 x 1.24 inches Receiver Weight: 77g / 2.72oz Material: ABS Color: Black Package Contents: 2 x Testers 1 x RJ11 Clip 1 x RJ11 Test Cable 1 x RJ45 Test Cable 1 x Storage Bag 1 x Headphones (Note: Other products are not included.) (Please note: Light reflections and different displays may cause the color of the item in the picture to differ slightly from the real item. The allowed measurement error is +/- 1-3 cm.) Your satisfaction is our top priority. We are committed to providing the best service. If you encounter any issues after receiving the product, such as damage or incorrect quantity, please contact us immediately for the best solution!