Feature: 1. Two rotatable alloy shafts, the wearing angle of food-grade skin-friendly ear hooks can be adjusted arbitrarily. 2. Compatible with various electronic devices such as Compatible for ios, Android, iPad, notebook, etc. Description: Product Name: Headphones Headphone parameters: Bluetooth-compatible version: V5.1+EDR Wireless frequency: 2.4GHZ Supported protocols: A2DP1.3/HFP1.6/HSP1.2/AVRCP1.6/D11.3 Transmission distance: 10 meters Battery capacity: 100mAh Charging voltage/current: 5V/1A Play/talk time: about 8 hours Charging time: about 1 hour Standby time: 120 hours Speaker impedance: 8MM 32 Microphone sensitivity: -42Db Working temperature: -10-50 Charging bin parameters: Input voltage/current: 5V/1A Battery capacity: 500mAh Charging compartment size: 11.5x6.5x2CM Packing list: 1 x Headphones 1 x Charging Bin 2 x Ear Cap 1 x Charging Wire 1 x User Manual Note: 1. Due to manual measurement, please allow 1-3cm error. Make sure you don"'"t mind before bidding. 2. Due to the difference of different monitors, the picture may not reflect the actual color of the product. Thanks.