High quality earphone Microphone size: 6.0 5.0mm. Microphone impedance: 2.2k. Microphone frequency: 20-1600 OHz. Microphone sensitivity: 56 ± 2dB. 3.5mm plug: suitable for Motorola SLIM SLIK SL7550.
eBay
No.3: applicable models: Motorola SL1M SL1K SL7550 etc. High quality walkie talkie headset. Microphone size: 6.0 5.0mm. Microphone impedance: 2.2k. Microphone frequency: 20-1600 OHz. Microphone sensitivity: 56 ± 2dB.
eBay
Motorola PMLN8191 1-Wire Covert Earpiece, Tube, 2.5mm - TLK, SL. Compatible with TLK 100, TLK 110, SL300, SL3500e, SL7000e series with 2.5mm single pin connector. SL Series: SL1K, SL2K, SL1M, SL300, SL500, SL500e, SL1600, SL2600, SL3500e.
eBay
SL2K SL7550 SL7550E SL7580 SL7590 SL8050 SL8550 SL8550E. Model :PMAE4092. Frequency : 480-527 UHF.
eBay
The product is a set of (12) SL7550 UHF radios. (10) of these radios are FCC ID ABZ99FT4090, the other (2) I've been able to identify their IDs. Does not include any accessories or software.
eBay
SL7550 SL7580 SL7590 SL4000 SL4010 SL4010e. Model :PMAE4078. Frequency :403-425MHz UHF.
eBay
eBay
Motorola SL1600 SL600 SL7550 SL7590 Radio C-Shape Swivel Inline PTT Earpiece. SL7000 / SL7000e Series: SL7550, SL7580, SL7590, SL7550e, SL7580e, SL7590e. Compatibility: Motorola SL1600 1 Pin Radio (Full list bellow).
eBay