1939年,他们造出了第一台无线背负式步话机(walkie talkie),型号为SCR-194。 SCR-194推出之后,缺陷很多,不适合战场使用。于是,军方开始邀请民营企业加入,共同进行项目的研究。 而加尔文公司,就是被邀请的民营企业之一。 加尔文公司牵头研发的型号,是SCR-536。当时的研发负责人,是公司总工唐·米切尔(Don Mitchell)。
making it ideal for use in noisy environments. **Designed for the Toughest Conditions** The Walkie Talkie 2.5mm Handheld Speaker PTT Mic is not just about performance; it's also designed to withstand the toughest conditions. With its IP54 waterproof rating, you can rely on this speaker microph...
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Retevis 1 Pin Walkie Talkie Earpiece Headset with PTT Mic for Retevis RT45 for Motorola T100 T107 T100TP T200TP T260 T260TP T280 T460C T465 T600 T605 T800 T5428 T6200 Two Way Radio Feature: All of our items are Brand New. A remote microphone with push to talk button you can clip anyw...
Walkie talkie remote speaker microphone for Motorola GP328PLUS TECHNICAL SPECIFICATION Speaker Dimension Φ36*8.6*9.8mm Impedance 8Ω Rated Input Power 1.0W Maximum Power 1.5W Sound Pressure Level 98 dB±3dB at 1KHz Frequency Range 50Hz - 5KHz Microphone Dimension Φ9.7*6.5mm ...
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Communication Antenna, Walkie Talkie Antenna Base Antenna High Gain Antenna Dimensionality Two-Dimensional Antenna Transport Package Original Packaging Specification standard Trademark Moto Origin Malaysia HS Code 8517142000 Production Capacity 10000 Packaging & Delivery ...
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PTT Speaker Mic For Motorola Radio Talkabout Walkie Talkie Radio (5.0)5 stars out of 1 review1 review About this item PTT ( PUSH TO TALK )Clear sound and accurate communicationFirm & durable housing, strain relief cable for maximum durabilitySuitable for Police, Mine area, Building site,...