Neoteck Portable 3. 5mm Headphone Amplifier with Bluetooth 5. 0 Receiver, Two-Stage Gain Switch, 16-300 Ohm HiFi Earphone Amp, Aluminum Matte Surface.

Specifications: Lithium battery capacity: 1500mAH Amp using time: about 13 hours Bluetooth decoding mode: SBC Bluetooth protocol: A2DP V1. 3. 1, AVRCP V1. 6 ,HFP V1. 7, HSP V1. 2 Bluetooth distance: 8m Max Amp battery voltage: DC3. 7V 4V Amp internal working voltage:4V SNR100Db THDN 0. 0003% Adapted Headphone Impedance: 16300Ω Dimension: 96 x 61 x 15mm(L x W x HPackage: 1 x Bluetooth Headphone Amplifier 1 x TypeC Power Cable 1 x Audio Cable 1 x Users Manual.