the green LED Lights work and tell you it is working well

Transmitter mode: red LED light

Dimensions: 9" L x 5 1/2" W x 4 3/4" H

the fogger matches with remote controller

08.1994-12.1998 For VOLVO 940 II (944) 135-189PS 4Pcs Fuel Injector 0280150804 Mini 400W Fog Machine Fogging Machine Portable With Wireless Remote Control Club the green LED Lights work4Pcs Fuel Injector For VOLVO 740 940 760 960 2. 0 2. 3 TURBO 0280150804 Feature: 1: According to the original factory specifications,perfect match for the original car. 2: Own different test machines to design exact accurate parameter for our products. All items were tested for performance. 3: Aftermarket product with premium quality. 4: Stable performance, high reliability,suitable for replacing your broken one. 5: These High Impedance fuel injectors