Fuctions:

Detecting cables, electrical lines-water/gas supply pipelines buried in wall or earth 
Detecting interruptions and short circuit in cables and electrical lines buried in wall or earth 
Detecting fuses and assigning current circuits 
Detecting interruptions and short-circuits in floor heating 
Tracing sockets and distribution sockets having accidentally been covered by plastering 

Features :

1. The transmitter is integrated with the function of AC/DC voltmeter, which can measure 12 to 400V AC/DC voltage on a linear basis. 
2. The screen of the transmitter can display preset transmitting power, transmitted codes-its own battery energy-mains voltage detected-AC/DC status of mains voltage detected-and warning symbol for mains voltage. 
3. The Transmitter has the function of self-inspection to detect its own working status and to display it on the LCD screen for user's reference 
4. The sensitivity of the receiver can be adjusted either manually or automatically 
5. The receiver can sweep frequency automatically 
6. Both the transmitter and the receiver can work under mute mode 
7. Additional transmitters are available to extende or distinguish  multiple signals. 
8. Compactness-durability and portability 
9. Auto power off within 10 minutes. 
10. Flashlight Function. 
11. Backlight Function. 
12. Mute Function. 

Specification:

Voltage Measurement Range : Transmitter: 12V-400V (AC / DC) 
Output Signal: Transmitter: 125KHz 
Voltage: Transmitter: maximum 400V (AC / DC) 
Cable Depth Measurement :Receiver 0-2.5 m (wall / underground cable) 
Main Voltage Measurement : Receiver 0-0.4m 
Work Environment:Transmitter:0~40C; Receiver:0~40C
Storage Temperature: Transimiter:-20C~60°c; Receiver:-20C~60C
Relative hamidity(no condensation):Transmitter Maximum:80%; Receiver Maximum:80% 
Measuring Height: Transmitter Maximum:2000m; Receiver Maximum:2000m 

General Characteristics:

Power Supply: Receiver: 1 * 9V LR61 (not included); Transmitter: 6 * 1.5vAAA (not included)
Dimension: Receiver: 241.5 * 78 * 38.5mm ; Transmitter: 190 * 89 * 42.5mm 
Product Weight: Receiver: 263g; Transmitter: 370g 
Package Size: 28 * 20 * 8.5cm / 11 * 7.8 * 3.3in 
Package Weight: 1053g / 2.3lb 

Package List:

1 x MASTECH MS6818 Transmitter 
1 x MASTECH MS6818 Receiver 
1 x Pair Test Lead 
1 x Pair Crocodile Clamps 
1 x Pair Test Probes 
1 x Grounding Rod 
1 x English Manual 
1 x Carrying Bag