* Vibration type,quiet within working * Size: 430 x 71 x 35 mm * 1 pc 9V Alkaline battery * Weight : 344g * Usage time: 4~6 hr continuousely Functions: Special attention should be given to the waist, underwarm, and ankle areas. The other small nail, pin, and so on, can be test our very easy. For the safety guard and find out the metals.
