Monolith by Monoprice Liquid Gold Balanced Headphone Amplifier and DAC by Alex Cavalli - Monoprice.com
Amazon.com: Ankbit E700 Hybrid Active Noise Cancelling Headphones, Bluetooth 5.1 Headphone with LDAC for Hi-Res Wireless Audio, Over Ear Wireless Headphones with aptX HD & Low Latency 60H Playtime (Obsidian Blue) :