Tibetan long trumpet
Tibetan long trumpet (Wyl. dung chen, Tib. Dungchen), also called copper trumpet (Wyl. rag dung, Tib. Ragdung) or red trumpet (Wyl. dung dmar, Tib. Dungmar)- a long trumpet or horn used in Tibetan Buddhist ritual. There are different sizes, some being about two meters long and others reaching lengths of even four or five meters.
Out of the four enlightened activities, the long trumpet is related to magnetizing.