diff --git a/backup.sh b/backup.sh
index e30ea7c..f4ad6c8 100755
--- a/backup.sh
+++ b/backup.sh
@@ -21,7 +21,7 @@ ZFS_SEND_OPTS="-pRLe"
 ZFS_SNAPSHOT_OPTS="-r"
 ZFS_RECV_OPTS="-vsu"
 SSH_SEND_OPTS="-Ti ~/.ssh/id_rsa"
-BANDWIDTH_LIMIT="100M"
+DEF_SPEED="20M"
 
 read LOCAL_HOST LOCAL_USER LOCAL_PORT LOCAL_TZ SEND_COMPRESSED < $nodes_file
 case $SEND_COMPRESSED in
@@ -66,7 +66,7 @@ list_datasets()
 }
 
 list_remote_datasets() {
-    while read addr user ssh_port zroot; do
+    while read addr user ssh_port zroot speed; do
         echo "=== $user@$addr $zroot ==="
         if [ $zroot ]; then
             case $zroot in 
@@ -122,7 +122,7 @@ zfs_allow_origin()
 
 zfs_allow_mirrors()
 {
-    while read addr user ssh_port zroot; do
+    while read addr user ssh_port zroot speed; do
         echo "=== $user@$addr $zroot ==="
         if [ $zroot ]; then
             case $zroot in 
@@ -160,7 +160,7 @@ create_snapshots()
 
 send_latest()
 {
-    while read addr user ssh_port zroot; do
+    while read addr user ssh_port zroot speed; do
         echo "=== $user@$addr $zroot ==="
         if [ $zroot ]; then
             case $zroot in 
@@ -174,12 +174,12 @@ send_latest()
             origin_snapshot=`get_latest_snapshot $dataset`
             if [ $BG_TEST_MODE = "TRUE" ]; then
                 echo zfs send $ZFS_SEND_OPTS $dataset@$origin_snapshot  \| \
-                    pv -qL $BANDWIDTH_LIMIT                             \| \
+                    pv -qL ${speed:-$DEF_SPEED}                             \| \
                         ssh $SSH_SEND_OPTS -o port=$ssh_port $user@$addr \
                             zfs recv $ZFS_RECV_OPTS $zroot$remote_dataset
             else
                 zfs send $ZFS_SEND_OPTS $dataset@$origin_snapshot |
-                    pv -qL $BANDWIDTH_LIMIT |
+                    pv -qL ${speed:-$DEF_SPEED} |
                         ssh $SSH_SEND_OPTS -o port=$ssh_port \
                             $user@$addr                            \
                                 zfs recv $ZFS_RECV_OPTS $zroot$remote_dataset
@@ -190,7 +190,7 @@ send_latest()
 
 send_increment()
 {
-    while read addr user ssh_port zroot; do
+    while read addr user ssh_port zroot speed; do
         echo "=== $user@$addr $zroot ==="
         if [ $zroot ]; then
             case $zroot in 
@@ -207,14 +207,14 @@ send_increment()
                 echo zfs send $ZFS_SEND_OPTS     \
                     -i $dataset@$remote_snapshot \
                     $dataset@$origin_snapshot    \| \
-                        pv -qL $BANDWIDTH_LIMIT \| \
+                        pv -qL ${speed:-$DEF_SPEED} \| \
                             ssh $SSH_SEND_OPTS -o port=$ssh_port $user@$addr  \
                                 zfs recv $ZFS_RECV_OPTS $zroot$remote_dataset
             else
                 zfs send $ZFS_SEND_OPTS          \
                     -i $dataset@$remote_snapshot \
                     $dataset@$origin_snapshot    | 
-                        pv -qL $BANDWIDTH_LIMIT |
+                        pv -qL ${speed:-$DEF_SPEED} |
                             ssh $SSH_SEND_OPTS -o port=$ssh_port $user@$addr  \
                                 zfs recv $ZFS_RECV_OPTS $zroot$remote_dataset
             fi