The Denver WTA-448 is a two-way radio (walkie-talkie) designed for license-free communication within the 400-470 MHz frequency band. It offers a range of features for clear and convenient communication, making it suitable for various personal and recreational uses.
Function Description:
The WTA-448 operates as a transceiving device, allowing users to send and receive voice messages. It features multiple channels and sub-channels (CTCSS) to minimize interference and ensure private communication. The device includes a Push-to-Talk (PTT) button for transmitting, a Call button for sending alert tones, and a Monitor button for checking weaker signals. It also incorporates a Voice-Activated Transmission (VOX) feature, enabling hands-free communication. For convenience, the device has a built-in flashlight.
Important Technical Specifications:
- Operating Frequency Range: 446.00625 – 446.09375 MHz
- Max Output Power: 0.5W
- Channels: 8/20/22 available radio channels (depending on region)
- Sub-channels (CTCSS): 99 available tones (67 to 250 Hz)
- Power Source: AAA-LR03 batteries (not supplied)
- Operating and Storage Temperature: 0°C to 40°C
- Display: LCD screen with backlight
- Connectivity: 2.5 mm jack for earpiece connection
Usage Features:
- Power On/Off: Press and hold the On/Off button (6) for 3 seconds until a confirmation beep is heard.
- Volume Adjustment: Use the Up button (4) to increase volume and the Down button (7) to decrease volume. The volume level indicator (3) is displayed on the LCD.
- Battery Level Indication: The battery icon on the LCD screen shows the charge level (full, 2/3, 1/3, empty). A flashing icon and beep indicate low battery.
- Receiving/Transmitting: The device is in "Reception" mode when lit up. Press the TALK button (15) to transmit a voice message, speaking into the microphone (10) at least 5 cm away. Release the button when finished. For other devices to receive, they must be on the same channel and CTCSS code.
- Changing Channels: Press the MENU button (11) once, then use the Up (4) or Down (7) buttons to select a channel. Confirm with the TALK button (15).
- CTCSS (Continuous Tone-Coded Squelch System): Press the MENU button (11) twice, then use the Up (4) or Down (7) buttons to select a CTCSS code. Confirm with the TALK button (15). To disable CTCSS, select "OF".
- Monitor Function: Press and hold the MON button (5) to check for weaker signals on the current channel. Release to disable. During monitoring, CTCSS codes are ignored.
- VOX (Voice-Activated Transmission): Press the MENU button (11) three times. Use the Up button (4) to set sensitivity (levels 1-3, 3 being most sensitive) or the Down button (7) to turn VOX off ("OF"). Confirm with the TALK button (15). VOX is overridden when the TALK button (15) is pressed.
- Scanning: Press the SCAN button (21) to activate channel scanning. The "Scan" indicator (17) will appear, and the device will continuously scan channels. Scanning stops when an active channel is found, allowing listening. It resumes automatically when transmission stops. Pressing TALK (15) during listening will return the radio to standby on that channel.
- Call Tones: The Twintalker has 10 call tones. To set, press the MENU button (11) four times ("CA" displayed), then use the Up (4) or Down (7) buttons to select a tone. Confirm with TALK (15). To send a call tone, briefly press the CALL button (12).
- Key Tone On/Off: To set, press the MENU button (11) five times ("to" displayed). Use the Up button to enable (ON) or Down button to disable (OF) key tones. Confirm with TALK (15).
- Roger Beep On/Off: To set, press the MENU button (11) six times ("rO" displayed). Use the Up button to enable (ON) or Down button to disable (OF) the roger beep. Confirm with TALK (15). The roger beep confirms when you stop talking.
- Button Lock: Press and hold the MENU button (11) for two seconds to activate/deactivate button lock. The button lock icon appears on the LCD. PTT (15), Call (12), MON (5), Lamp (20), and On/Off (6) buttons remain functional.
- Display Backlight: Press any button (except On/Off) to activate the LCD backlight for 5 seconds.
- Earpiece Connection: Insert the 2.5 mm jack of the included earpiece into the connector (8) on the upper side. The small button on the earpiece functions as the TALK button (15). When using the earpiece's TALK button, use its microphone.
- Built-in Flashlight: Use the Lamp button (20) to activate the flashlight (22) for light signals or illumination.
Maintenance Features:
- Battery Installation: Remove the belt attachment clip (23) and lift the belt attachment (24). Open the battery compartment (26) and insert AAA batteries (25), ensuring correct polarity. Close the lid.
- Battery Saving Function: The device automatically enters economy mode after a period of inactivity to save battery life. This does not affect message reception, and standard mode is reactivated upon signal detection.
- General Safety:
- Not a toy; keep out of reach of children and pets.
- Do not mix old and new batteries or different types. Remove batteries during long periods of non-use.
- Do not expose to heat, water, moisture, or direct sunlight. The unit is not waterproof.
- Do not open the product; repairs should only be performed by qualified personnel.
- Do not use non-original accessories.
- Recycling: The device is recyclable. Dispose of it at designated collection points for electrical and electronic equipment (marked with the crossed-out trash can symbol) or return it to stores. Do not dispose of with household waste.
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