1. Sand resistant of sealed design. 2. Bulit-in Timer of Memory function. 3. With two loud speakers of 50W or 35W(optional). 4. With 2 forceps of wire and use DC12V power. 5. Built-in 182 sounds 6. Built-in RECALL Key,User can easily shift cut the songs from current play song back to pre-play song. 7. Complete set of products include: 1 bird caller, 2 speakers, 1 12V wire, 1 user'smanual, 1 Tool-box. 8. Size: 110*60*44MM 9. G.W: 1.5KG/SET