S7 Bluetooth Headset 5.0 $ 17.80 Material Technology: ABS+ Aluminum Alloy Socket type: USB Power supply: Built-in lithium battery / DC5V power supply Regular colors: red, rose gold, gray, black Product size: 755929mm Product net weight: 0.15kg Channel mode: Stereo Play format: Bluetooth playback Amplifier specifications: 5mW*1 Charging power supply: DC5V power supply Battery capacity: Headphone 55 mAh, charging compartment 500 mA with protection board Channel mode: Stereo Frequency response: 2.4GHz Charging bin: 65g Support audio codec: A2DP/AVRCP/HFP/HSP