Trampoline Bluetooth Waterproof Speaker with 3 Mounting Options Trampoline Bluetooth Speaker. Portable Bluetooth Speaker to attach to your trampoline. Easy listening from the comfort of your trampoline. Water resistant. Syncs to most phones. 3 Mounting options including detachable tail, elastic tie and suction cup. Soft, durable silocone design, waterproof design. Rechargeable Battery.