EXMAX HRD-831 User Manual

Portable card FM transmitter
Dear customer :
Thanks for ordering our portable plug in card type FM transmitter model HRD-831. This product build up with
High quality import electronic components , with super long power up to 20 hours , one button for mono / stereo audio
exchange , 16 sound level can be adjusted , with separate AUX audio input port , MIC microphone input port and key lock
function . Adjustable frequency 88.1-107.9 MHz ( can also set to fixed frequency )
good anti interference power for better security , suitable for tourist guide , training course , traveling , study activities .
Please read the manual in detail before use and keep the manual for later inquiry .
1) Product function diagram :
① LCD display
② TF card port ( support MP3 format )
③ Mic port
④ 3.5 mm AUX port
⑤ Power on / off button
⑥ PREV - frequency , volume increase switch , long press for mono / stereo interchange
⑦ NEXT - frequency , volume decrease switch , long press for frequency lock
⑧ MENU - interchange button for MIC / AUX / FM
⑨ ▷‖Play / pause
⑩ Lock switch
⑪ battery cover
⑫、Waistband

EXMAX HRD-831 Specifications

General

Brand	EXMAX
Model	HRD-831
Category	Transmitter
Language	English

Summary

Product Function Diagram

Device Component Identification

Identification and brief description of device components shown in the product diagram.

Device Operation

Battery Insertion and Power On

Instructions for inserting the battery and powering on the FM transmitter.

Audio Playback Modes

Details on internal MP3 playback and playing external audio via AUX.

Microphone Connection

Guidance on inserting a microphone for chatting.

Function and Volume Adjustment

How to interchange functions and adjust volume or frequency.

Lock and Unlock Functionality

Procedure to lock or unlock device functions.

Device Charging Procedure

Steps and indicators for charging the device.

Stereo Mode Selection

How to switch between mono and stereo audio modes.

Operational Notices and Product Features

Operating Precautions

Important notices regarding safe and proper operation of the product.

Product Key Features

Highlights of the product's technical capabilities and audio quality.

Suitable Applications

Lists recommended uses and user groups for the FM transmitter.

Specifications and Package Contents

Main Specification Data

Detailed technical specifications of the FM transmitter.

Package Contents

List of items included in the product package.

Warranty and Compliance Information

Warranty Card Details

Information regarding product warranty terms and conditions.

FCC Compliance Statement

Regulatory compliance information related to FCC rules.