diff --git a/README.md b/README.md
index 75f2b40..e44b146 100644
--- a/README.md
+++ b/README.md
@@ -2,16 +2,29 @@
 
 chuniio driver for tasoller custom 2.0 firmware
 
+Uses WinUSB driver instead of libusb
+
+Written in Zig (Sorry, I can't stand Windows-flavoured C++)
+
+Downloads avaliable in [releases](https://dev.s-ul.net/akiroz/chuniio-tasoller/-/releases)
+
 ## USB Protocol
 
 Custom firmware USB device: 1CCF:2333
 - Interface 1
     - Endpoint 4 IN Interrupt (0x84)
+        - data len: 36 bytes
+        - data[0-2]: {0x68, 0x66, 0x84} (magic?)
         - data[3]
             bit 0-5: beam 1-6 (1 = blocked)
             bit 6-7: fn1 & fn2 (1 = pressed)
         - data[4-35]: touch sensor 1-32 pressure
     - Endpoint 3 OUT Bulk (0x03)
+        - data len: 240 bytes
+        - data[0-2]: {0x42, 0x4C, 0x00} (magic?)
+        - data[3-95]: Slider LED (GRB order, right->left)
+        - data[96-167]: Left LED (GRB order top->bottom)
+        - data[168-239]: Right LED (GRB order bottom->top)
 
 ### Build
 
diff --git a/src/main.zig b/src/main.zig
index 69205b4..03c6a79 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -51,6 +51,7 @@ var input_thread: ?std.Thread = null;
 
 var usb_op = std.Thread.Mutex{};
 var usb_in = std.mem.zeroes([0x24]u8);
+var usb_out = std.mem.zeroes([80*3]u8);
 var tasoller: ?*anyopaque = null;
 
 fn tasoller_init() !void {
@@ -114,8 +115,12 @@ fn tasoller_init() !void {
         std.log.err("[chuniio] WinUsb_Initialize: {any}", .{GetLastError()});
         return error.AccessError;
     }
+
+    // Init magic bytes
+    std.mem.copy(u8, usb_out[0..3], &[_]u8{0x42, 0x4C, 0x00});
 }
 
+// Poll input regardless of slider start/stop
 fn input_thread_proc() void {
     while(true) {
         usb_op.lock();
@@ -130,6 +135,8 @@ fn input_thread_proc() void {
 fn slider_thread_proc(callback: chuni_io_slider_callback_t) void {
     var pressure = std.mem.zeroes([32]u8);
     while(slider_active) {
+        // Tasoller order: top->bottom, left->right
+        // Chunithm order: top->bottom, right->left
         for(usb_in[4..]) |val, i| pressure[if(i%2 == 0) 30-i else 32-i] = val;
         callback.?(&pressure);
         std.time.sleep(1_000_000); // 1ms
@@ -204,14 +211,22 @@ export fn chuni_io_slider_stop() void {
 
 export fn chuni_io_slider_set_leds(rgb: ?[*]u8) void {
     if(rgb == null) return;
+    
+    var n: u32 = 0;
+    const out = usb_out[3..96];
+    while(n < 31) : (n += 1) {
+        out[n*3+0] = rgb.?[n*3+2];
+        out[n*3+1] = rgb.?[n*3+1];
+        out[n*3+2] = rgb.?[n*3+0];
+    }
+
     usb_op.lock();
     defer usb_op.unlock();
-    _ = rgb;
+    if(WinUsb_WritePipe(tasoller, 0x03, @ptrCast(*u8, &usb_out), usb_out.len, &n, null) == 0) {
+        std.log.warn("[chuniio] WinUsb_WritePipe: {any}", .{GetLastError()});
+    }
 }
 
 pub fn main() !void {
     try tasoller_init();
-    // input_thread_proc();
-    _ = try std.Thread.spawn(.{}, input_thread_proc, .{});
-    while(true) {}
 }
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