diff --git a/README.md b/README.md
index 2cade97..c48f2af 100644
--- a/README.md
+++ b/README.md
@@ -2,10 +2,12 @@
 DMRconfig is a utility for programming digital radios via USB programming cable.
 Supported radios:
 
- * TYT MD-380 (not tested)
- * TYT MD-2017 (not tested)
+ * TYT MD-380, Retevis RT3, RT8
+ * TYT MD-2017, Retevis RT82 (untested)
  * TYT MD-UV380
-
+ * Zastone D900 (untested)
+ * Zastone DP880 (untested)
+ * Radtel RT-27D (untested)
 
 ## Usage
 
diff --git a/md380.c b/md380.c
index f7fba96..324b218 100644
--- a/md380.c
+++ b/md380.c
@@ -2295,3 +2295,60 @@ radio_device_t radio_md380 = {
     md380_parse_row,
     md380_update_timestamp,
 };
+
+//
+// Zastone D900
+//
+radio_device_t radio_d900 = {
+    "Zastone D900",
+    md380_download,
+    md380_upload,
+    md380_is_compatible,
+    md380_read_image,
+    md380_save_image,
+    md380_print_version,
+    md380_print_config,
+    md380_verify_config,
+    md380_parse_parameter,
+    md380_parse_header,
+    md380_parse_row,
+    md380_update_timestamp,
+};
+
+//
+// Zastone DP880
+//
+radio_device_t radio_dp880 = {
+    "Zastone DP880",
+    md380_download,
+    md380_upload,
+    md380_is_compatible,
+    md380_read_image,
+    md380_save_image,
+    md380_print_version,
+    md380_print_config,
+    md380_verify_config,
+    md380_parse_parameter,
+    md380_parse_header,
+    md380_parse_row,
+    md380_update_timestamp,
+};
+
+//
+// Radtel RT-27D
+//
+radio_device_t radio_rt27d = {
+    "Radtel RT-27D",
+    md380_download,
+    md380_upload,
+    md380_is_compatible,
+    md380_read_image,
+    md380_save_image,
+    md380_print_version,
+    md380_print_config,
+    md380_verify_config,
+    md380_parse_parameter,
+    md380_parse_header,
+    md380_parse_row,
+    md380_update_timestamp,
+};
diff --git a/radio.c b/radio.c
index 9a7b362..f873208 100644
--- a/radio.c
+++ b/radio.c
@@ -69,12 +69,18 @@ void radio_connect()
     const char *ident = dfu_init(0x0483, 0xdf11);
     fprintf(stderr, "Connect to %s.\n", ident);
 
-    if (strcasecmp(ident, "DR780") == 0 ||      // TYT MD-380, Retevis RT3, RT8
-        strcasecmp(ident, "ZD3688") == 0 ||     // Zastone D900
-        strcasecmp(ident, "TP660") == 0 ||      // Zastone DP880
-        strcasecmp(ident, "ZN><:") == 0) {      // Radtel RT-27D
+    if (strcasecmp(ident, "DR780") == 0) {      // TYT MD-380, Retevis RT3, RT8
         device = &radio_md380;
     } else
+    if (strcasecmp(ident, "ZD3688") == 0) {     // Zastone D900
+        device = &radio_d900;
+    } else
+    if (strcasecmp(ident, "TP660") == 0) {      // Zastone DP880
+        device = &radio_dp880;
+    } else
+    if (strcasecmp(ident, "ZN><:") == 0) {      // Radtel RT-27D
+        device = &radio_rt27d;
+    } else
     if (strcasecmp(ident, "2017") == 0) {       // TYT MD-2017, Retevis RT82
         device = &radio_md2017;
     } else
diff --git a/radio.h b/radio.h
index 4b3cc16..68bce67 100644
--- a/radio.h
+++ b/radio.h
@@ -98,9 +98,12 @@ struct _radio_device_t {
     int channel_count;
 };
 
-extern radio_device_t radio_md380;   // TYT MD-380
-extern radio_device_t radio_md2017;  // TYT MD-2017
-extern radio_device_t radio_uv380;   // TYT MD-UV380
+extern radio_device_t radio_md380;      // TYT MD-380
+extern radio_device_t radio_md2017;     // TYT MD-2017
+extern radio_device_t radio_uv380;      // TYT MD-UV380
+extern radio_device_t radio_d900;       // Zastone D900
+extern radio_device_t radio_dp880;      // Zastone DP880
+extern radio_device_t radio_rt27d;      // Radtel RT-27D
 
 //
 // Radio: memory contents.