Wireless FM Transmitter-668A
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wireless fm transmitter
1. lnsert two pieces of 1.5V AAA size batteries in the battery compartment. The LCD display will show the time.
2. Press ON/OFF button once enter transmit mode, LCD will show the current transmit frequency . press or button to increase or decrease adjust frequency. Press ON/ OFF button once again to stop transmit and the real time will show on LCD display.
3. When you want store current frequency, press M1, M2 or M3 button for about 3 seconds for the store location for you to select frequency easily . When you want to use the store frequency , Press M1. M2 or M3 button once . The memory number will show on display.
4. When the unit show the time , press and hold SET button for about 3 seconds enter setting mode , the last number of minute will flash , press or button to set your desired digit , press SET button to confirm and enter to set the first digit of minute , using the same operation to set the digit of minute and hour . The LCD will show the time after not pressing button for about 3 seconds.
5. When in the transmit state , press SET button will show the time for about 3 seconds.
6. Low battery detect function .
7. Temperature display.
(1) Frequency response :20Hz-20KHz
(3) Operating current:38mA
(4) Transmission range:87.5-108.0MHz(interval 0.1MHz)
(5) Power source: 2AAA batteries or the cars power source
(6) Transmit distance>5m
(7) Distortion <=3%(F=75KHz. f=1KHz)
(8) Signal to noise ratio >=45db