diff --git a/sys/netgraph/bluetooth/drivers/ubt/ng_ubt.c b/sys/netgraph/bluetooth/drivers/ubt/ng_ubt.c
--- a/sys/netgraph/bluetooth/drivers/ubt/ng_ubt.c
+++ b/sys/netgraph/bluetooth/drivers/ubt/ng_ubt.c
@@ -152,6 +152,13 @@
 static ng_rcvmsg_t	ng_ubt_rcvmsg;
 static ng_rcvdata_t	ng_ubt_rcvdata;
 
+static int              ng_ubt_isoc_trans = 1;
+
+SYSCTL_NODE(_hw, OID_AUTO, ubt, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, "UBT");
+
+SYSCTL_INT(_hw_ubt, OID_AUTO, isochronous_transfer, CTLFLAG_RDTUN|CTLFLAG_MPSAFE,
+	   &ng_ubt_isoc_trans, 1, "enable isochronous transfer");
+
 /* Queue length */
 static const struct ng_parse_struct_field	ng_ubt_node_qlen_type_fields[] =
 {
@@ -735,8 +742,9 @@
 	}
 
 	/* Setup transfers for both interfaces */
-	if (usbd_transfer_setup(uaa->device, iface_index, sc->sc_xfer,
-			ubt_config, UBT_N_TRANSFER, sc, &sc->sc_if_mtx)) {
+	if (usbd_transfer_setup(uaa->device, iface_index, sc->sc_xfer, ubt_config,
+			(ng_ubt_isoc_trans) ? UBT_N_TRANSFER : UBT_N_TRANSFER/2,
+			sc, &sc->sc_if_mtx)) {
 		UBT_ALERT(sc, "could not allocate transfers\n");
 		goto detach;
 	}
@@ -1541,10 +1549,12 @@
 		 * to send to avoid any delays.
 		 */
 
-		ubt_xfer_start(sc, UBT_IF_1_ISOC_DT_RD1);
-		ubt_xfer_start(sc, UBT_IF_1_ISOC_DT_RD2);
-		ubt_xfer_start(sc, UBT_IF_1_ISOC_DT_WR1);
-		ubt_xfer_start(sc, UBT_IF_1_ISOC_DT_WR2);
+		if (ng_ubt_isoc_trans) {
+			ubt_xfer_start(sc, UBT_IF_1_ISOC_DT_RD1);
+			ubt_xfer_start(sc, UBT_IF_1_ISOC_DT_RD2);
+			ubt_xfer_start(sc, UBT_IF_1_ISOC_DT_WR1);
+			ubt_xfer_start(sc, UBT_IF_1_ISOC_DT_WR2);
+		}
 
 		mtx_unlock(&sc->sc_if_mtx);
 	}