For the 0.78mm dual-pin version, the protruding length of the dual-pin is about 3.6mm. Due to product design issues, a small number of earphones are not perfectly compatible with UTWS5, so you need to purchase an adapter. Features:- >Qualcomm’s latest QCC5141 Bluetooth chip. >Independent AK4332 DAC chip. >Independent Amplifier chip. >Third-generation TWS mode for Low-Latency and Lower Lag. >Bluetooth V5.2 connectivity. >Hi-Res Bluetooth transmission(Up to 24-Bit/96kHz). >AptX Adaptive, AptX, AAC, SBC wireless codec support. >AptX Voice support for crystal clear voice transmission over calls. >Precise volume adjustment with 32 volume levels. >New advanced charging case for long battery life. >Wireless charging support(Wireless charger not included in the package). >IPX4 Water-resistant. >FiiO Control and FiiO Music app support. Presenting you the FiiO UTWS5, the latest TWS adapters featuring Qualcomm s latest QCC5141 Bluetooth chip that provides Bluetooth V5.2 connectivity. It adopts AKM s high-performance AK4332 independent DAC chip with an independent amplifier for high-resolution audio signal decoding, lower distortion, and a high Signal-to-Noise ratio. Experience a new realm of truly wireless Bluetooth with the UTWS5 connected to your HiFi In-Ear Monitors. Qualcomm s Latest Bluetooth Chip:- FiiO has featured the latest Qualcomm QCC5141 Bluetooth processor with the UTWS5. UTWS5 now supports high-resolution Bluetooth transmission with a better and stable Bluetooth connection. It also brings support for AptX voice that provides high-definition voice transmission suitable for calls and conferences. Impressive Sound With Independent DAC Chip:- FiiO has equipped the UTWS5 with AK4332 an independent DAC chip to provide high-resolution audio performance with lower distortion and high SNR ratings. You will experience your music with all-new clarity with a clean background and smooth detail reproduction with the UTWS5. Our high-resolution earphones go completely wireless with the UTWS5. Independent Amplifier Chip:- With an independent DAC Chip, the UTWS5 also features an independent AMP chip. The UTWS5 provides a powerful output thrust that brings our connected earphones to life. UTWS5 has a much powerful output thrust in comparison to the previous generation UTWS3. Bluetooth V5.2 Connectivity With Hi-Res Audio Transmission Codec:- FiiO UTWS5 supports the latest Bluetooth V5.2 connectivity with high-resolution AptX Adaptive wireless transmission. AptX adaptive provides 24-Bit/96kHz wireless transmission with low latency and lag. There is no lag or delay in the audio and video synchronization, you get a stable Bluetooth connection for watching movies or playing video games on the go. With the latest QCC5141 Bluetooth chip, the UTWS5 also supports AptX Voice transmission that enables 32khz super sideband voice transmission, perfect for calling. Third-Gen TWS Lower Latency Technology:- FiiO UTWS5 adopts Qualcomm’s third-generation TWS mirroring technology. It effectively reduces latency and instability in the signal and provides a smooth user experience. TWS mirroring allows for seamless switching between being connected to the main and secondary units. Long Battery Life With Wireless Charging Support:- FiiO UTWS5 charging case supports wireless charging. Please note that the wireless charger is not included in the package. This charging case has a large 800mAh battery that provides up to 4 charges to the adapters. Upon a single charge, the adapters provide 8 hours of music playback. Technical Specifications:- >Bluetooth Version: V5.2. >Battery Life: >8H on each charge. >30H with charging case. >Standby: >200H. >Output Power: 33mW@32Ω, 53mW@16Ω. >USB Type-C charging port, Wireless charging. >Connector options: MMCX/0.78mm. >Weight(Without earphones): approx 8grams.