N81AP

This is the 4th Generation iPod Touch. It was announced on September 1st, 2010.

Application Processor

It makes use of the S5L8930 application processor (presumably).

Wireless

The iPod touch 4G (likely) uses the BCM4329 for Wi-Fi (802.11 b/g) and Bluetooth 2.1.

New Hardware

• Front VGA camera for Facetime
• Rear camera
• Built in microphone
• Gyroscope
• Retina Display
• A4 processor, likely the S5L8930 or similar.

Specifications

Size: 110.0 mm (4.4 inches) (h), 58.9 mm (2.3 inches) (w), 7.2 mm (0.28 inches) (d)
Weight: 101 g (3.6 oz)
Battery: 40 hours of audio, 7 of video
Rear camera: 0.7MP, supporting HD video recording @ 30FPS
Front camera: VGA photos and video @ 30 FPS, supporting FaceTime Video Calls