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This is a camera board for Polaroid SX70/SONAR/680 

• Totally rebuild with modern micro controller.
• New light sensor with best accuracy in low lighting condition.
• Accurate exposure control in daylight.
• Manual exposure & remote shutter release via internal Bluetooth control interface.
• Dual-ISO for both 600/i-Type and SX70 instant film.
• Compatible all regular SX-70, also Sonar and SLR680.
• Reliable opration with programmable firmware.
• APPLE IOS APP *Android apk shutter controller available
• New physical controller is available

item including:

PCB: 1*circuit board and 1*metering hole filter

The physical controller link:

https://www.ebay.com/itm/374838921367?hash=item5746240897