Omnidirectional lavalier microphone offers an interchangeable condenser cartridge and consists of a windscreen and a dual tie clip for 2 microphones.
Shure MX183 Condenser Microphone - Omni : Musical Instruments
Rode Lavalier Omni Lapel Microphone - Sound Productions
They're no bigger than a paper clip unless you consider the sound they produce. The Microflex Lavalier microphones bring a new level of sophistication to personal voice reproduction. Like all Microflex family microphones, the Lavaliers use Shure's interchangeable condenser cartridges, available in cardioid, supercardioid or omnidirectional polar patterns. That means you can be sure there's a Microflex Lavalier that's right for your job.
Shure MX183 Omnidirectional Condenser Lavalier Microphone
R184 - Supercardioid Cartridges - Shure USA
Shure MX183 Omnidirectional Lavalier Microphone
Shure MX183 Microflex Lavaliere Microphone
Shure R184 Supercardioid Cartridge for Microflex Series R184W-A
Shure WL183 Omnidirectional TQG Lavalier Condenser Microphone for Speech Applications with 1.2m (4 ft) Cable Terminated with a 4-pin Mini Connector (Wireless Bodypack Transmitter Sold Separately) : Musical Instruments
SHURE - MX183