This radio is made in china，a few info from
http://bb.power-dy.com ,only the following attattachment info and photos.
Brand：united-star ，US
PRC-148 radio
Frequency：VHF 136~173.995MHz or
UHF 400~469.995MHz
volt：2000Ma 7.2V Li
channels：1^99
power：5W（high）/1w(low)
Batteries: rechargable
Accessories：short Antenna，Extension cable，long Antenna，molle system Fixed Buckle，Chargers......Official Product's plug will be U-283/U
Functions：
1. CTCSS Signaling
2. DCS signaling
3. Scan
4. Pairs of waiting
5. Call end tone
6. Low-power
7. 99 channel
8. Computer Programming
9. Channel name can be edited
10. Busy lock (BCLO)
11. Voice Launch (VOX)
12. Received Signal Strength Indicator
13. Battery indicator
14. 1750Hz audio launch
15. Wireline copy (write through data lines to the radio-frequency)
16. Emergency Alarm
17. Adjustable backlight brightness
18. Squelch Digital-conditioning
19. Can be voice-activated emission
20. Can be locked-channel mode
21. Scan channel list editing functions, namely, each channel can choose not to participate in scanning parameters
General Specifications
Frequency range VHF 136 ~ 173.995MHz
UHF 400 ~ 469.995MHz
Frequency stability 5PPm
Memory Channel 100 Ge
Antenna Impedance 50 Ohm
Volume
Weight
Emission targets
Output Power 5W (high-power mode) / 1W (low-power mode)
Adjustment method 16K0F3E (W) / 11K0F3E (N)
Maximum deviation 5KHz (W) / 2.5KHz (N)
Spurious Radiation ≤ 7uW
Audio features 6dB / octave
Emission current ≤ 2.4A (high) / ≤ 0.8A (low)
CTCSS / DCS offset 0.75KHz (W) / 0.375KHz (N)
Modulation Sensitivity 12mv
Modulation Distortion ≤ 5%
Receive indicator
Receiver sensitivity 123dBm (12dB SINAD)
Receiver bandwidth 5KHz (W) / 2.5KHz (N)
Audio Power 0.5W
Audio Distortion ≤ 10%
Blocking 85dB
Intermodulation 65dB
Adjacent Channel Selectivity 65dB
Spurious rejection 70dB