Advantages and features:
1. Built-in battery.
2. Single band control switch. You can turn on /off each band separately and without  influencing other bands.
3. With inside cooling fans, and have wind slots in both sides,make a constant cooling working.
4. With AC adapter and Car charger, can be used in the car directly.
5. Easy to carry, portable design. With leather case, can be tied at the waist or arm.                                                                                                                              6. Full charged, it can last working about 90 minutes.
USA Standard :  850--960MHz, 1805--1990MHz,2110-2170MHz,2400-2500MHz  
EURO standard : 925-960MHz, 1805--1880MHz,2110-2170MHz,2400-2500MHz  
Total output power :2.0W     Power Supply: AC adaptor (AC 110/240V, DC12V)     Built-in battery : 1800mA/h
Shielding radius: 5-15 meters ( still determined by your background signal strength)
 Dimension: 113(H)×60(L)×31(W)mm     Net weight: 0.275Kg      Packing  Weight: 0.775KG    Delivery time: Within 2 days