.. _1 Introduction:

1 Introduction
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1.1 Overview
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This document describes how to use the Hmbirdservertob_vXX.apk to bind a 3DoF contoller to Pico VR device.

**Note:** To make the apk auto-start when device boot-up, please run it once after installing the apk on device. 

1.2 Supported Devices
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-  Pico G2 4K series