MoonDrop Sparks Review - Unplug and Play - Written review by FC Construct. Moondrop's Special VDSF Tuning Curve:- Moondrop's IEMs are famous for their VDSF(Virtual Diffuse Sound Field) frequency tuning curve, which is pretty detailed and crisp in terms of sound quality. Moondrop has tuned the Sparks TWS following the same tuning curve to deliver a detailed sound output. Bluetooth V5.2 Connectivity:- Moondrop Sparks TWS supports the latest Bluetooth V5.2 connectivity. It offers a stable, lag-free Bluetooth signal transmission with up to 10m range. The pair is equipped with a high-performance Bluetooth audio circuit based on the Qualcomm QCC3040 Bluetooth chip. The pair also supports AptX, AAC hi-res Bluetooth codecs. Easy To Use Touch Controls:- The Moondrop Sparks earpieces can be operated using the touch-enabled face panels. They offer several features including 2-second long touch for the voice assistant, double-tap for pickup/hangup calls, double-tap for play/pause music, and so on. Moondrop's Self-Developed Application Support:- Moondrop has developed an all-new application for the Sparks TWS(International Version), Moondrop Link. It can be used for online OTA firmware updates, sound quality expansion(switching different sound profiles), and function expansions through OTA updates. Up To 48 Hours Music Playback:- The Moondrop Sparks TWS earpieces have a battery life of up to 8 hours on a single charge. With the charging case, they support music playback for up to 48 hours. So you will get more than an entire day of music without worrying about the battery life. Specifications: Frequency Response: 20- 20000Hz(IEC60318-4) Driver Unit: 6mm Dynamic Driver Housing Material: ABS/PC Diaphragm: Berylium-Coated Dome + PU Suspension Ring Driver Coil: 0.035mm-CCAW Magnetic Circuit: (HEMC)improved High Efficiency Magnetic Circuit+N52 Neodymium magnet Acoustic Filter: Patented Anti Clogging Filter Bluetooth Version: Bluetooth 5.2 Audio Transmission Formats: aptX Adaptive/aptX/AAC/SBC Battery Capacity: Earphone 50mAh I Charging Case 700mAh Playback time: 8 hours on earphone + 48 hours on charging case Charging rating: 5V-500mA Operation: Touch, Light + Voice prompt Bluetooth Range: 10 meters  Supplier of Bluetooth PCBA: Self-developed