diff --git a/KnownCommands/W820NB_Plus.txt b/KnownCommands/W820NB_Plus.txt
new file mode 100644
index 0000000..705818f
--- /dev/null
+++ b/KnownCommands/W820NB_Plus.txt
@@ -0,0 +1,149 @@
+Service UUID: 
+EDF00000-EDFE-DFED-FEDF-EDFEDFEDFEDF
+Edifier APP Logcat ID: 
+SPPUtil
+
+标准模式
+sendData:AA02C1012187
+readData:BB03C10106219F
+降噪模式
+sendData:AA02C1022188
+readData:BB03C1020621A0
+环境声模式
+sendData:AA02C1032189
+readData:BB03C1030621A1
+
+环境声音量
+3
+sendData:AA03C103092193
+readData:BB03C1030921A4
+2
+sendData:AA03C103082192
+readData:BB03C1030821A3
+1
+sendData:AA03C103072191
+readData:BB03C1030721A2
+0
+sendData:AA03C103062190
+readData:BB03C1030621A1
+-1
+sendData:AA03C10305218F
+readData:BB03C1030521A0
+-2
+sendData:AA03C10304218E
+readData:BB03C10304219F
+-3
+sendData:AA03C10303218D
+readData:BB03C10303219E
+
+键控全开
+sendData:AA03F10A0721C8
+readData:BB03F10A0721D9
+无标准模式(降噪+环境)
+sendData:AA03F10A0621C7
+readData:BB03F10A0621D8
+无降噪模式(标准+环境)
+sendData:AA03F10A0521C6
+readData:BB03F10A0521D7
+无环境模式(标准+降噪)
+sendData:AA03F10A0321C4
+readData:BB03F10A0321D5
+
+耳机提示音量
+7
+sendData:AA02060720D2
+readData:BB02060720E3
+6
+sendData:AA02060620D1
+readData:BB02060620E2
+5
+sendData:AA02060520D0
+readData:BB02060520E1
+3
+sendData:AA02060320CE
+readData:BB02060320DF
+1
+sendData:AA02060120CC
+readData:BB02060120DD
+15
+sendData:AA02060F20DA
+readData:BB02060F20EB
+
+关机
+sendData:AA01CE2192
+
+定时关机
+off
+sendData:AA01D22196
+readData:CC02D20121BA
+5min
+sendData:AA03D10005219C
+readData:CC02D10121B9
+15min
+sendData:AA03D1000F21A6
+readData:CC02D10121B9
+30min
+sendData:AA03D1001E21B5
+readData:CC02D10121B9
+1h
+sendData:AA03D1003C21D3
+readData:CC02D10121B9
+3h
+sendData:AA03D100B4224B
+readData:CC02D10121B9
+
+游戏模式开
+sendData:AA02090120CF
+readData:BB02090120E0
+游戏模式关
+sendData:AA02090020CE
+readData:BB02090020DF
+
+经典模式
+sendData:AA02C4002189
+readData:CC02C40021AB
+sendData:AA01D52199
+readData:BB02D50021AB
+流行模式
+sendData:AA02C401218A
+readData:CC02C40121AC
+sendData:AA01D52199
+readData:BB02D50121AC
+古典模式
+sendData:AA02C402218B
+readData:CC02C40221AD
+sendData:AA01D52199
+readData:BB02D50221AD
+摇滚模式
+sendData:AA02C403218C
+readData:CC02C40321AE
+sendData:AA01D52199
+readData:BB02D50321AE
+
+改名
+abc
+sendData:AA04CA61626322B7
+readData:CC02CA0121B2
+12345
+sendData:AA06CA31323334352292
+readData:CC02CA0121B2
+ABCDEF
+sendData:AA07CA4142434445462329
+readData:CC02CA0121B2
+中文测试
+sendData:AA0DCAE4B8ADE69687E6B58BE8AF952A38
+readData:CC02CA0121B2
+中文Eng123
+sendData:AA0DCAE4B8ADE69687456E673132332796
+readData:CC02CA0121B2
+
+LDAC
+关
+sendData:AA024900210E
+readData:BB024900211F
+48k
+sendData:AA024901210F
+readData:BB0249012120
+96k
+sendData:AA0249022110
+readData:BB0249022121
diff --git a/app/src/main/res/raw/cmd.json b/app/src/main/res/raw/cmd.json
index 7b736dc..e34169e 100644
--- a/app/src/main/res/raw/cmd.json
+++ b/app/src/main/res/raw/cmd.json
@@ -38,5 +38,17 @@
     {
         "name": "cmd_poweroff",
         "cmd": "CE"
+    },
+    {
+        "name": "cmd_ldac_off",
+        "cmd": "4900"
+    },
+    {
+        "name": "cmd_ldac_48k",
+        "cmd": "4901"
+    },
+    {
+        "name": "cmd_ldac_96k",
+        "cmd": "4902"
     }
 ]
\ No newline at end of file
diff --git a/app/src/main/res/values-zh-rCN/strings.xml b/app/src/main/res/values-zh-rCN/strings.xml
index 2c49777..df567f2 100644
--- a/app/src/main/res/values-zh-rCN/strings.xml
+++ b/app/src/main/res/values-zh-rCN/strings.xml
@@ -16,4 +16,7 @@
     <string name="cmd_poweroff">关机</string>
     <string name="btn_connect">连接</string>
     <string name="toast_device_not_found">未找到设备</string>
+    <string name="cmd_ldac_off">LDAC: OFF</string>
+    <string name="cmd_ldac_48k">LDAC: 48kHz/44.1kHz</string>
+    <string name="cmd_ldac_96k">LDAC: 96kHz</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 6e80bb0..597003d 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -5,11 +5,14 @@
     <string name="cmd_noise_reduction">Noise: Noise Reduction Mode</string>
     <string name="cmd_noise_ambient">Noise: Ambient Sound Mode</string>
     <string name="cmd_eq_normal">EQ: Normal</string>
-    <string name="cmd_eq_pop">EQ: POP</string>
+    <string name="cmd_eq_pop">EQ: Pop</string>
     <string name="cmd_eq_classical">EQ: Classical</string>
     <string name="cmd_eq_rock">EQ: Rock</string>
     <string name="cmd_game_on">Game Mode: ON</string>
     <string name="cmd_game_off">Game Mode: OFF</string>
+    <string name="cmd_ldac_off">LDAC: OFF</string>
+    <string name="cmd_ldac_48k">LDAC: 48kHz/44.1kHz</string>
+    <string name="cmd_ldac_96k">LDAC: 96kHz</string>
     <string name="cmd_poweroff">Poweroff</string>
 
     <string name="toast_no_bluetooth">Bluetooth adapter not found</string>