https://jinyatong.en.made-in-china.com/product/VskJBjWPLUhK/China-Hotsale-8-Antennas-Portable-Signal-Jammer-Handheld-Cell-Phone-Jammer-with-Nylon-Case-Lojack-Version.html

No need to use another jammer,this bands jammer can meet your target of most general type of affected
frequencies.Easy to carry on,it's handheld.Good cooling system with cooling fans inside.

Product Application:

1.It can be applied at meeting rooms, conference rooms,
museums, galleries, theaters, concert halls, churches, temples,
restaurants, classrooms, training centers, factories, banks, trains,
bus and more.
2.For some locations of special purpose such as hospitals, gas
stations and more, please do field test first to make sure no
interference happened to the normal operation of their equipment
and instrument.

Features:

1.With nylon cover, easy to carry.

2.Configured to block eight different frequency bands continuously or simultaneously.

3.With DIP Switch.Separete swicth for each band,accopanied with a working LED light.

4.Total RF output power up tp 5.5 watt.

5.Could be used in car directly. With car charger and AC charger.

6.. With Built-in Battery: 4000mA/h.Charge full time about 4Hours.Working time: 1.5 hours.

7. Inside 2 cooling fans and heat sink design ensure the device to work continuously.

Parameters
Shielding Range:	20M(-75dBm,depending on the distance of base station in an open filed)
Total output power:	5.5W
Power supply:	50-60Hz, 100-240V AC,DC12V.
Dimension:	156x 88 x 46mm(not include antennas)
Full set weight:	1.5kg
Jammed Signal Types:	CDMA,GSM,PCS,DCS,3G,4G WIMAX,4G,LTE,GPS,WIFI…
Output Channel:	8 output channels
Frequencies
European standard	American standard
CDMA: 850-894MHz	CDMA: 850-894MHz
GSM:925-960MHz	GSM: 925-960MHz
GSM/PCS: 1805-1990MHz	GSM/PCS: 1805-1990MHz
3G:2110-2170MHz	3G:2110-2170MHz
WIFI 2.4G: 2400-2500MHz	WIFI 2.4G: 2400-2500MHz
4GLTE:790-826MHz	4GLTE:725-770MHz
4GWIMAX:2620-2690MHz	4GWIMAX:2345-2400MHz
GPS:1570-1580MHz	GPS:1570-1580MHz