GRN生產一系手動音頻播放設備, 專用於在電力和電池價格昂貴或很難獲得的區域使用。
從早期我們所做的手動電唱機，以及了不起 卡通話的卡板唱機。
這href="/zh-Hant/saber">Saber手動數碼播放器是目前在世界各地使用的
GRN的音頻播放設備
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The "CardTalk" cardboard record player
The simple but ingenious CardTalk cardboard player was developed to play phonograph records without electricity.
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The "Messenger II" hand crank cassette player
The Messenger II is a sturdy hand-wind cassette player for use by churches and missions where commercial cassette equipment is not available.
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The "TapeTalk 2" hand crank cassette player
The TapeTalk 2 is a mono player that is powered by turning a handle, and is designed for use in locations where there are no batteries or other sources of power
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手動數碼播放器"Saber"
這Saber手動數碼播放器目前正在世界各地使用。這堅固耐用固態裝備可播放MP3和WMA規格的檔案。