MR F57B - Walkie-talkie COBRA - Free user manual and instructions
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| Product Type | Two-Way Radio (Walkie-Talkie) |
| Brand | Cobra |
| Model | MR F57B |
| Color | Black |
| Dimensions | 115 x 55 x 32 mm (approx.) |
| Weight | 240 g (including battery) |
| Power Supply | Rechargeable 7.4V Li-ion battery (1500 mAh) |
| Frequency Range | 400-470 MHz (UHF) |
| Number of Channels | 16 |
| Output Power | High: 5W, Low: 1W (adjustable) |
| Communication Range | Up to 5 km in open areas |
| Water Resistance | IPX4 splash-proof |
| Battery Life | Up to 14 hours (5/5/90 cycle) |
| Charging Time | Approximately 3-4 hours |
| Main Functions | 16 channels, VOX, CTCSS/DCS, scan, backlit display |
| Care and Cleaning | Wipe with a soft, dry cloth; avoid solvents. |
| Safety | Not suitable for children under 6 years; use only original accessories. |
| Spare Parts and Repairability | Replacement antenna, battery, belt clip and charger available; contact Cobra support. |
| General Information | This device operates in the UHF band. For legal use, license may be required depending on your country. |
Frequently Asked Questions - MR F57B COBRA
How do I turn on the Cobra MR F57B walkie-talkie?
Press and hold the Power/Menu button for about 2 seconds until the LCD screen turns on. To turn off, repeat the same action.
How do I adjust the volume?
Use the Volume Up/Down buttons on the side. The current volume level appears on the display. This adjustment is automatically saved.
How do I select a communication channel?
Press the Channel Up/Down keys to cycle through available channels. You can also enter a specific channel number using the keypad if supported. The selected channel is displayed on the screen.
How do I charge the battery?
Insert the rechargeable battery into the radio, then connect the AC adapter to the charging dock or directly to the radio. The charge indicator lights up during charging and turns green when fully charged. A full charge takes about 3-4 hours.
Can I use the walkie-talkie while it is charging?
Yes, you can operate the radio in a limited power mode while connected to the charger, but for maximum performance and battery health, it is recommended to switch off the device during charging.
What is the maximum communication range?
The range depends on the environment. In open areas with no obstructions, you can expect up to 5 km. In urban or indoor settings, the range is reduced to 1-2 km due to buildings and interference.
How do I activate the VOX function for hands-free use?
Before using VOX, ensure your headset is connected. Then press the Menu key and select the VOX option in the setup menu. Choose a sensitivity level (Low/Medium/High) and exit the menu. Speak directly into the microphone - the radio will transmit automatically when your voice is detected.
Is this walkie-talkie waterproof?
The Cobra MR F57B has an IPX4 splash-proof rating. It can withstand light rain and splashes, but it is not designed to be immersed in water. Keep the battery and charging contacts dry.
How can I improve the battery life?
To get the longest battery life, reduce the transmit power to low (1W) when communicating over short distances, lower the backlight brightness, and turn off the scan function when not needed. Fully discharge and recharge the battery at least once a month to maintain capacity.
How do I set the CTCSS/DCS privacy tones?
Join the menu, select CTCSS/DCS, and choose the desired tone frequency or code. Using the same code on all radios in your group ensures that you only hear transmissions with that code, reducing interference from other users on the same channel.
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Download the instructions for your Walkie-talkie in PDF format for free! Find your manual MR F57B - COBRA and take your electronic device back in hand. On this page are published all the documents necessary for the use of your device. MR F57B by COBRA.
USER MANUAL MR F57B COBRA
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Product information
Brand : COBRA
Model : MR F57B
Category : Walkie-talkie