The MPB is a Polish

Poland

Poland , officially the Republic of Poland , is a country in Central Europe bordered by Germany to the west; the Czech Republic and Slovakia to the south; Ukraine, Belarus and Lithuania to the east; and the Baltic Sea and Kaliningrad Oblast, a Russian exclave, to the north...

 off-route anti-tank mine

Anti-tank mine

An anti-tank mine, , is a type of land mine designed to damage or destroy vehicles including tanks and armored fighting vehicles....

. The mine consists of a cylinder mounted horizontally in a heavy steel frame, hidden from direct view of a designated target, which is used to aim the mine. It uses a Misznay Schardin effect warhead to project an armour piercing metal slug or EFP(Explosively Formed Penetrator) to an effective range of around 50 meters where it can penetrate up to 100 millimeters of armour. The mine can be triggered by either a contact fuze

Fuze

Fuze Beverage, commercially referred to as just Fuze , is a manufacturer of teas and non-carbonated fruit drinks enriched with vitamins. Currently the brand consists of five vitamin-infused lines: Slenderize, Refresh, Tea, Defensify, and Vitalize...

 or a passive infra-red sensor, and is also fitted with an anti-handling device

Anti-handling device

An anti-handling device is an attachment to or integral part of a landmine or other munition e.g. some fuze types found in air-dropped bombs such as the M83, cluster bombs and sea mines. It is specifically designed to prevent tampering. When the protected device is disturbed it detonates, killing...

.

When used with the passive infra-red fuze, an acoustic sensor detects approaching vehicles and activates the infra-red sensor, which triggers the mine at the optimal moment as the target passes. The mine can be programmed to self-destruct after either 1, 10 or 30 days have passed.