BSIDE FWT21 Network Cable Tester Telephone Wire Checker Tag-Home key & Side Key 51inch * 6

51inch * 6

USB2: DC5V-3

reduce distortion

do not worry about the child hight is not enough

Smooth damping technology

BSIDE FWT21 Network Cable Tester Telephone Wire Checker Tag-Home key & Side Key 51inch * 61. Audio signal: 1. 5kHZ 2. Receiving frequency range: 100HZ 300kHZ 3. Battery supply: 9V(6F22) x 2 (shipping does not include) 4. Can be used for a variety of cable line installation, inspection and maintenance, convenient for daily life 5. Can be used to determine whether the cable line continuous tracking cable line 6. Determine the location of the line break receiving cable lines (telephone lines) in the audio signal to determine the state of the