Condenser microphone. With the Memory Mic, you can capture amazing sound in broadcast quality, the perfect accompaniment to your video. Memory Mic initially connects via Bluetooth and you don’t have to worry about getting out of range. The microphone continues to record at any distance from your smartphone. The Memory Mic records up to 4 hours of audio which will automatically synchronize with your smartphone video via a Sennheiser Memory Mic App, downloadable through App Store or Google Play. Features one touch synchronization of audio and video. Easy to attach with magnetic clip. USB charging. Pick-up pattern: Omnidirectional. SPL: 119 dB SPL. Equivalent noise level: 28 dB (A) SPL. Frequency range: 2.4 - 2.4835 GHz. Resolution: 48 kHz / 16 bit. Audio frequency response: 100 - 20,000 Hz. Operating time: 4 hours. Power supply: Battery - built-in Li-Polymer rechargeable. Charging time: 2 h. Transmission method: Bluetooth 4.1 and higher WLAN IEEE 802.11 b/g/n. Dimensions: 51 x 37 x 16 mm. Weight: 30 g. Colour: White