The Samson RB2030 rechargeable battery kit is designed to give you high quality sound anywhere electricity is not available. This Samson is also perfect for power outages! The RB2030 is perfect for shows at the beach, street, parks, and pool-side. No longer let electricity define where you play, with the Samson RB2030 Expedition rechargeable battery pack! Use with Samson EXL250 Expedition Express!