ARTEXTREME R5 Bluetooth 5.0 Wireless Headphone o Amplifier 180Mw AAC Decoding for iPhone 1. Built-in A180 headphone amplifier module, warm color analog sound tuning, full and fine listening, by strengthening the frequency response dynamics of middle and low frequency, solve the problem of mobile phone sound quality and digital taste as much as possible to restore the real frequency response of the instrument, 2. Through the 180mW post-amplification, the volume density is improved as a whole, and the subtle signals are also amplified and presented, and the hearing is full and delicate 3. in the amp part, a complex frequency control network is used to filter out the noise caused by encoding and compression, making the sound more pure 4. Built-in differential amplifier chip, output 180mW o power, high-thrust o output, meet the power requirements of most headphones, ensure that there is enough energy to restore all kinds of subtle information in music, whether it is low-frequency volume or medium and high-frequency detail overtones can be clear Present 5. in the production of digital o, the masking effect of the human ear is widely used to compress various high and low frequency information to obtain a smaller file size Bluetooth Core: QCC3008X Bluetooth Specification: Bluetooth 5.0 Bluetooth Power: Class Two Transmission Distance: About 30 meters Supported codec:aptX-LL aptX AAC sbc Compatible Bluetooth Profiles: A2DP AVRCP / HSP/ HFP Hardware Structure: Qcc3008x+24bit / DAC + Headphone amplifier Out Impedances:Less than 300ohm Dynamic Range: 90db Frequency Range: 20-27000hz SNR: 95db THD: 0.006% Music Powe: 180mw @ 16Q * 2 Battery Type:Lithium polymer battery 450mah Charging Time: 45minutes Battery life: 26hours Standby Time:240hours Charging Method:5V1A Colour:black Material:ABS Size: 39 x 80 x 13mm Package Contents: 1 x headphone amplifier 1 x charging cable Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.