BTDVR - Bluetooth Headset Earpiece Spy Hidden Video Camera Recorder w/ Built-in 4GB Memory Video resolution: 640 x 480 AVI, 30fps Built-in 4GB memory (about 4 hours recording time) Built-in microphone for audio recording Takes still digital photos: 1024 x 768 pixels Recharable lithium battery via USB, battery life about 90 minutes