The FiiO BTR3K is a balanced Hi-Fi Bluetooth amplifier designed for high-quality audio playback. It features a balanced output design with separate DACs and amplifiers for the left and right channels, aiming for the purest sound possible. The device has an aluminum alloy body with a 2.5D glass arc and an oleophobic coating to resist fingerprints. An RGB light indicator shows the current audio format being used. It utilizes two AK4377A DACs, offering a 50% increase in power output compared to its predecessor, with a distortion of -107dB and a signal-to-noise ratio of 122dB. The balanced output power is 78mW, and the single-ended output power is 25mW. It incorporates independent dual crystal oscillators (22.5792MHz/24.576MHz) to reduce jitter and increase audio stability. The Qualcomm CSR8675 Bluetooth chip provides a 120MHz DSP and supports 24-bit transmission and processing, along with multiple lossless Bluetooth codecs. The BTR3K supports Bluetooth 5.0 for faster pairing and a more stable connection, with compatibility for SBC, aptX, aptX LL, aptX HD, and LDAC audio formats. It features a USB Type-C connector for listening while charging, with a full charge taking 1.5 hours and providing up to 11 hours of playback. The amplifier includes an omnidirectional microphone and phone controls, utilizing eighth-generation noise suppression technology for clear calls. It can automatically detect headphone types and adjust output accordingly, and supports CTIA controls for microphone and playback functions. The product type is an AV Receiver.