functions:                
 tone trace the required line among numerous ones, perfect for tracking , RJ45, cables or other metal wire (via adapter)                
 It testes physical connection status of network cable, such as open circuit, short connection, miswire and reverse connection                
Use the emitter to test the status of working of telephone lines, such as judging TIP or PING line and judging whether the telephone line is idle, ringing or off-hook                
 Highlights for 60V endurable, users can track wires which is in low-electricity less than 60V without burnout or damaged.                 
 Clips allow easy access to individual pairs and RJ11 RJ45 easily connect to telephone jacks---no need for adapters                
 Used on single conductors, twisted pairs, telephone cable and electrical wiring, a practical tool for service providers in network infrastructure installation, certification, and troubleshooting.

Technical indexes:         
NF-811 Transmitter specification        
Dual Tone frequency    0.6kHz    1.3kHz
Max. distance of transmission    2 kilometers    
Max. working current    30mA    
Compatible connectors  , RJ45    
Max. signal voltage    8Vp-p    
Function display    Led for Wiremap, Tone for trace    
Voltage protection    DC 60V    
Battery Type    DC9.0V（NEDA 1604/6F22 ) x1pc    
Dimension(LxWxD)    130*47*35mm    
NF-811 Receiver specification        
 Tone frequency    0.6~1.3kHz    
The Max. working current    90mA    
Earphone jack    1    
Battery Type    DC9.0V（NEDA 1604/6F22 ) x1pc    
Dimension(LxWxD)    180*45*30mm  

Accessories Included:    
Tone Generator      x 1pcs
Amplifier probe    x 1pcs
User Manual       x 1pcs
9V battery      x 2pcs
Earphone      x 1pcs
Carry bag    x 1pcs
Gift box    x 1pcs