1 pcs Microphone FM Transmitter Module & 1 pcs 100W Watt Power Metal Shell Case Wirewound Resistor 100W Watt Power Metal Shell Case Wirewound Resistor: A heat radiating groove on the surface.Small size of large power; High temperature resistant; Strong overload capacity with high weather resistance.High precision, low standard induction resistance, high stability, strong architecture. Good flexibility,multiple choice, good for machinery protection, more convenient for users to install. Scope of Application: aging test power supply; inverter; automation equipment; ACOUSTICS; frequency divider and high requirements in bad industrial equipment use. Type: 2 Ohm 2R 100W Watt Power Metal Shell Case Wirewound Resistor Microphone FM Transmitter Module: This product will be put the sound around the on-board microphone into FM radio radio signals emitted,To achieve pickup and wireless audio FM transmitter Product launch frequency is adjustable,The green component on the core board is adjustable capacitance Change the adjustable capacitor can change the transmission frequency,Adjustable range covers the 88 - 108 MHz GB FM section You can use the radio and mobile phone as a receiver This product is widely used in voice pickup transmission,audio MIC,sleep monitoring,and other suitable occasions Operating voltage:0.7 - 9 V Frequency adjustment range:88-108 MHz Transmission distance:50 - 100 meters(9 V when using the 70 cm antenna conductors) Color:green +silver & Gold Material:PC +metal & Aluminum alloy 100W Watt Power Metal Shell Case Wirewound Resistor Size: 60mm x 21mm x 16mm Package Contents: 1 x Microphone FM Transmitter Module 1 x 100W Watt Power Metal Shell Case Wirewound Resistor Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.