Main functions:
1. Locating & tracking buried and hidden wires .
2. Determining Which Receptacles are on specific circuits.
3. Pinpointing Drill Sites before drilling.
4. White LED Flash Light .

Technical indexes:
NF-816L Transmitter specifications
Tone frequency 900Hz
The Max length distance 1000 feet
The Max depth distance 3 feet
The Max. working current Less than 70mA
Tone mode 1 Tone
Max. signal voltage 15Vp-p
Signal display Signal tone, Antenna
Voltage protection AC 60V/DC 42V
Battery type DC9.0V（NEDA 1604/6F22) x 1pc
Dimensions (LxWxD) 49 x 135 x 33mm
NF-816L Receiver specifications
Frequency 900kHz
The Max. working current Less than 70mA
Earphone jack 1
Battery type : lithium battery
Dimensions (LxWxD) 43 x 168 x 27mm