All-pass CT-668 is an economical and practical professional handheld walkie-talkies, the most suitable for the construction, property management, security, factories, mines, police, retail stores, hotels, restaurants, entertainment and service industries use those looking for simple, reliable and the right choice for economical and practical two-way radio professional radio business, to ensure easy communication in the work area. 



 The best environmental choice: high-rise building, underground tunnel, the mountain jungle, outdoor activities, and security of property. 







 Product Specifications: 
 * Frequency range :150-170MHz; 400-430MHz; 450-470MHz 
 * Number of channel 16 (15 + S) 
 * Power: 4W/5W 
 * Operating temperature -30 ° C to +60 ° C 
 * Power supply voltage of 7.2V 
 * Size 58 wide x 125.5 high × 32 deep mm 
 * Weight 200g (host, without battery and antenna) 400g (using the battery and antenna) 
 * Frequency stability ± 2.5ppm 

 Efficient: 

 * Loud, clear call so that users can maintain smooth communication even in noisy environments. 

 The 16 channels allow users to their work teams into different talk groups, thereby increasing the flexibility of the radio communications. 

 * Line (PL) and digital line (DPL) feature helps to prevent outside interference call on the same frequency. 

 * Long battery life allows the user's talk time up to 8 hours. 

 * LED indicator and audio tone can remind users to low battery 



 Easy to use: 

 * Professional, sophisticated radios for handheld, you can easily grip the entire work shift. 

 * Rotary channel knob can be quickly and easily connected to a different call groups. 

 Transponder / transceiver function allows the user to select a point-to-point communication, or click a button to communicate through the repeater. 

 * By durable Monitor, the user do not need to have been pressing the programming button, you can always use the monitor mode. 



 Stable and reliable: 

 * Conforms to U.S. Military Standard C, D, E, and F 

 * Built-in 50 group CTCSS/104 Group DCS function 

 * Power saving design automatically enters a power save state 

 * Professional, durable, waterproof, shock 

 * Superb, high stability, large volume, high-definition sound quality 

 * MOS FET final stage power amplifier components 




 CT-668 Technical Specifications: 

 General Specifications 

 Frequency 
 (400 - 430) MHz, 
 (450 - 470) MHz, 

 The number of channels 
 16 (15 + S) 

 Channel spacing 
 12.5 - 25 kHz 

 Operating Temperature 
 -30 ℃ ~ +60 ° C 

 Antenna impedance 
 50? 

 Microphone impedance 
 2K? 

 Batteries (standard configuration) 
 7.2V == 1300mAH 

 Dimensions (W × H × D) 
 58 × 125.5 × 32 

 Weight 
 200 g (main body only) 400 g (host, with battery and antenna) 

 Receiving part 

 Sensitivity (12dB SINAD) 
 0.25 of μ V 

 Modulation receiver bandwidth 
 ± 7kHz (broadband) 

 Adjacent channel selectivity 
 ≥ 70dB (broadband) 

 Intermodulation interference 
 ≥ 65dB 

 Audio output power 
 500mW (distortion less than 5%, 16?) 

 Transmitter 

 Transmit power 
 4W 

 5 \ 6 \ 7 \ 8 \ 9W (high) / 2W (low) 

 Modulation mode 
 16K0F3E (broadband) 

 Noise and harmonics 
 ≤ -70 dB 

 Residual FM (300 ~ 3000Hz) 
 -45 DB 

 FM distortion (300 ~ 3000Hz) 
 ≤ 3% 

 Frequency stability 
 ± 2.5ppm 

 Maximum frequency deviation 
 ± 5kHz