Bowers & Wilkins PI7. Not the S2. Battery and functionality confirmed. Both units have been initialized to factory settings. For those seeking ultra-low latency with the rare aptX LL (low latency), it comes with a bonus aptX LL compatible transmitter (retailing for around 7,400 yen). The PI6, PI7 S2, and PI8 inexplicably do not support aptX LL, making this a very rare model. I received this as a gift from a friend about 3 years ago, so I don't have proof of purchase. I've used it a few times, but it's practically new. aptX LL has been confirmed, and all connections are working perfectly. I have higher-end earphones in the same class that I prefer, so I haven't used these much, just checked the battery and stored them. I'm not considering selling individual items or immediate price reductions. If it doesn't sell, I will gradually lower the price, so please purchase it at your desired price. - Model: PI7 - Color: Charcoal - Accessories: Charging case, LR unit, original USB-C charging cable, original 3.5mm stereo cable, original ear tips (various sizes) There are no other items besides those listed, including proof of purchase. The manual was either missing or not included from the beginning. Please refer to the online manual here: https://dm-importaudio.jp/vc-files/bw-other-data/PI7_Manual_JP.pdf Thank you for viewing.