Hamilton Buhl Bluetooth Wireless Audio Receiver Supports Bluetooth 2.1+EDR and Bluetooth 2.0, 1.2, and 1.1 backward compatibility Connects to any dock with a 30 pin apple connector High quality 95dB SNR DACs with 48kHz sample rates for high-fidelity playback Frequency range 2402MHz-2480MHz Modulation GFSK, 1Mbps, 0.5BT Gaussian