This shape has four types jammer:
Black: Only block the Cellphone Signal
Silvery: Block Cellphone and GPS Signal ( Not contain 3G signal )
Light Brown: Block GPS L1 and GPS L2 Signal
Deep Green: Block WiFi Signal

Specification
Black: Mini Portable Cellphone Jammer

A: America Market Cellphone Jammer Frequency
Output port Frequency Radius Range
CDMA 850-894MHz Up to 5-10meters radius.
Depending on the mobile service providr's Network condition)
GSM 925-960MHz
DCS PHS 1805-1990MHz
3G 2110-2170MHz

B: Europe Market Cellphone Jammer Frequency
Output port Frequency Radius Range
GSM 925-960MHz Up to 5-10meters radius.
Depending on the mobile service providr's Network condition)
DCS GSM1800 1805-1880MHz
3G 2110-2170MHz
Silvery: Block Cellphone and GPS Signal ( Not contain 3G signal )

Output port Frequency Radius Range
CDMA GSM 850-960MHz Up to 5-10meters radius.
Depending on the mobile service providr's Network condition)
DCS GSM1800 GSM1900 1805-1990MHz
GPS L1 1500-1600MHz

Light Brown: Block GPS L1 and GPS L2 Signal
Output port Frequency Radius Range
GPS L1 1500-1600MHz Up to 10meters radius.
GPS L2 1200-1300MHz
Deep Green: Block WiFi Signal
Output port Frequency Radius Range
WiFi 2400-2500MHz Up to 10meters radius.
Total output power: 0.5Watt
Shielding Radius: 3-15meters

Design virtue, Why choose the Mini Portable Signal Jammer
A: It seems, It isn't a "Jammer", Top Hidden
B: Internal antenna, and Insulate per antenna, It can working more efficiently.
C: Replace Battery is very easy by hand, Same with mobile phone
D: Charging can Been Nokia charge
E: High Quailty Design, Low hot, It can continue work 356days with charge