Description:

quick details

packaging & delivery

specifications

wireless headphone:
1.2.4ghz wireless
2.double way transmit-receive device

wireless headphone main features:

a. profile

mmd-0552 is a 2.4ghz wireless double way transmit-receive device; usb double transmits music to wireless headphone,the wireless headphone has a microphone for chatting; with a external audio input port, can use as a common headphone; support windows me/2000/xp/nt or higher edition; headphone has built-in li-ion battery, can repeated use

b. model: mmd-0552 

c. product drawing

d. button description:

1. headphone:

:on/off/marching:

v-:volume down

v+:volume up

e. specification:

quiescent current (headphone): under 1ua

working current (headphone): under 70ma

quiescent current (transmitter): under 80ma

working voltage (transmitter):5v

transmit power: +2dbm

level of sensitivity: -66dbm

working voltage (headphone): 3.7- 4.2v

charging current (headphone): under 200m(led shows red)

output power (headphone): 15mw*2

battery capability (headphone): 320mah

charging time (headphone): 2.5hours

working hours (headphone): 4-6hours

battery cycle life (headphone): ≥300 times

effective distance: outdoor ≥10m

channel separation: 1k hz, one channel is silent, the other channel-3db fs    67db

total harmonic distortion:

1k hz, -1db fs, volume setting = 0db -68 db

1k hz, -3db fs, volume setting = 0db -70 db

1k hz, -13db fs, volume setting = 0db -76 db

voice mode:

stereo audio + mono voice

audio: 84db snr,48 khz sampling rate

voice:  64db snr, 16 khz sampling rate

audio mode: stereo audio db snr, 48 khz sampling rate

f. user guide

button function:

1.plug usb-hid(dongle)to pc usb female port,pc will detect and install it automatically

2.(headphone)a short push “ ” to power on (about 1 second),a long push“ ”to power off (about 3 seconds);green lighting shows playing and microphone working, then you can chat

3.(headphone)push“v+”+1 sound,a long push will progressively increase

4.(headphone)push“v-”-1 sound,a long push will progressively decrease

5.a long push“ ”to power off (about 3 seconds);

6.if not play or paused more than 60 second,it will shutdown automatically

7.headphone charging by usb:use usb wire to connect pc, then red led out shows charging with constant current;red led shows power full

headphone/usb-hid led(green light):

1.green means working normally

2.1 times flash in 1 second:usb-hid does not connect the headphone(you need to match the code).

3.quick flashing:code matching

code matching by headphone and usb-hid(dongle):

1. plug usb-hid to pc,push usb-hid code match button 5 seconds until green light quick flash;

2. push " "5 seconds on headphone,green light quick flash

3. you will see both green light on dongle and headphone flash quickly, when the green light normally on ,it matched the cord

g.  input/output audio source:

1.input audio source:

1.turn off the headphone

2.plug od3.5 to od3.5 audio wire to “audio in”od3.5 female port

3.connect the other part with mp3/ipod output port as a earphone

2. output audio source:

a. connect d3.5 to od3.5audio wire with “audio in”od3.5female audio port

b. connect the other part with amplifier or earphone audio source input port 

h. reliable test

standard testing conditions:

temperature: 5-35°c, humid:45-85%, air pressure: 860-1060mbar. relative temperature: 20±2°c, relative humid: 60-70%, under the air pressure: 860-1060mbar

high temperature test    it is normal condition after exposing at 50°c for 60 hours.

low temperature test    it is normal condition after exposing at -30°c for 60 hours

humidity           it is normal condition after exposing at 30°c, 95% for 60 hours

i. note

1.do not use it in very cold/hot/ash rich/moist/dry conditions(applicable temp:-25°cto -50°c)

2.do not drop it

3.please keep the battery semi-saturation(half-charged) if you won`t use it in a long term, and fully charge it 2-3 month later, then keep it semi-saturation again; store the battery away from sunlight in a cool place, your battery will have a longer life

please note:

(1)system shutdown automatically,please recharge it

(2)no reaction when push the button, please recharge it

(3)the battery will be charged whether power on or off once connected with pc

(4)do not open the body;

(5)we may update the function

j. accessories

1.od3.5 to od3.5black 3 core audio wire

2.usb a to mini usb connector

k.product photo