The apperance is very great,with double colour plastic rubber ,one is soft ,the other one is rigid .
The display screen is 2.31",packed by the rubber .

Extend Your Hands & Eyes !
1.Aerospace:Inspect and Repair the blade of aviation engine
2.Military equipment:Inspect and Repair the submarine,tank armored car and Barrel
3.Car repair and maintenance:Inspect and Repair the car frame,chassis,engine etc.
4.Security:security control in Custom,station.Airport etc.
5.Architectural:Inspect and Repair pipeline,circuity,wall etc
6.Electric power generation:Inspect and Repair the turbine of the nuclearpower,heatingpower,  Waterpower and windpower equipment
7.Oil and nature gas :Inspect and Repair the pressure vessel and steam generator
8.Electric equipment and electronic industry:Inspect the production equipment and product’s R&D.
9.Sea and River:fish culture view and hydrology research
10.Science education and Laboratories:View animal’s in the hole and karst cave .

Model:99D2-8530L1 Portable borescope
Display Screen:2.31" TFT LCD
Dia of Lens:8.5mm (5.5mm 3.9mm ,dual lens and articulated lens optional)
Tube length:1M (2M 3M 5M Extened tube 10M)
Lens pixels:640*480
Sensor:1/5  CMOS
Waterproof:Lens and flexible tube waterproof IP67
View angle:54°
Light sources:6pcs diammable white LED lights
Focal distance:3-8 cm
Image colour :changeanbe
Power supply:4 pcs AA batteries

Packing:
1*main unit(monitor)
1* 1M Dia 8.5mm lens
1*instruction manual
1*mirror,hook ,magnet 

About Battery:(not included in package)
Suitable for  4 pcs 1.5V  AA battery (working 1-3 hours)
Working temperature:0-45degree centigrade
Rechargeable battery is not suitable ,because once put in ,it is hard to
take out ,it will be easy to damage the battery during the process.
Alkaline batteries are better.