Parts from Knowles, ED Inventory

100 Hz ~ 80 kHz Analog Microphone MEMS (Silicon) 1.5 V ~ 3.6 V Omnidirectional (-38dB ±3dB @ 94dB SPL) Solder Pads

Distributor	SKU	Stock	MOQ	1	10	50	100	1,000	10,000
DigiKey	423-SPU0410LR5H-QBDKR-ND	58255		$0.66	$0.54	$0.47	$0.44	$0.36	$0.31

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300 Hz ~ 5 kHz Analog Microphone Magnetic Omnidirectional (-75.5dB ±3dB @ 74dB SPL) Solder Pads

Distributor	SKU	Stock	MOQ	1	10	50	100	1,000	10,000
DigiKey	423-BJ-21590-000-ND	218		$40.18	$32.76	$28.66	$28.66	$28.66	$28.66

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Distributor	SKU	Stock	MOQ	1	10	50	100	1,000	10,000
DigiKey	1956-6926-13-ND	150		$24.15	$19.42	$17.53	$16.94	$15.95	$15.95

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Receiver with Dimensions: 5.17mm x 3.55mm x 3.00mm (.204in x .140in x .118in)

Distributor	SKU	Stock	MOQ	1	10	50	100	1,000	10,000
Mouser Electronics	721-FFC-26654-I02	0	25			$27.75	$27.30	$27.30	$27.30

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Receiver with Dimensions: 5.99mm x 3.10mm x 2.59mm (.256in x .122in x .102in)

Distributor	SKU	Stock	MOQ	1	10	50	100	1,000	10,000
Mouser Electronics	721-GD3031593000	0	25			$39.07	$39.07	$39.07	$39.07

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Microphone with Peak Frequency: 7000 Omni-directional

Distributor	SKU	Stock	MOQ	1	10	50	100	1,000	10,000
Mouser Electronics	N/A	0

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Microphone with Peak Frequency: 12000 Omni-directional

Distributor	SKU	Stock	MOQ	1	10	50	100	1,000	10,000
Mouser Electronics	N/A	0

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Microphone with Peak Frequency: 9500 Uni-directional

Distributor	SKU	Stock	MOQ	1	10	50	100	1,000	10,000
Mouser Electronics	N/A	0

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Trimmer/Variable Capacitors

Distributor	SKU	Stock	MOQ	1	10	50	100	1,000	10,000
Mouser Electronics	768-TP38	0	50			$211.10	$211.10	$211.10	$211.10

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Trimmer/Variable Capacitors Eco-Trim

Distributor	SKU	Stock	MOQ	1	10	50	100	1,000	10,000
Mouser Electronics	843-1518	0	200					$20.33	$20.32