•【Innovative Telescoping Design】Features a unique retractable earpiece cable design that allows for adjustable length, eliminating the need to keep the earphone in your ear for extended periods and preventing cable tangling for enhanced comfort and flexibility. •【Smart Vibration Alert】Incoming call vibration reminder function ensures you never miss important calls, with both device vibration and LED flashing notifications. •【Intelligent Voice Prompts】Smart voice broadcasting feature announces caller numbers and provides status updates in real-time, including "Pairing connected," "Battery is low," and "Telephone dialing" notifications. •【Dual Language Support】Convenient Chinese and English bilingual switching capability for voice prompts and system announcements. •【Real-time Battery Display】LED digital display screen shows remaining battery percentage in real-time, keeping you informed of power levels at all times. •【Dual Device Connection】One-drag-two functionality allows simultaneous connection to two smartphones for seamless switching between devices. •【Versatile Clip-on Design】Can be clipped to shirt collars or suit lapels for hands-free operation, perfect for business professionals and long conference calls. Specifications: •Model: K55 •Chip: JL •Bluetooth-Compatible Version: V 5.2 •Transmission Distance: 10m •Charging Voltage: DC5V •Charging Time: 20 minutes •Talk Time: 20 hours •Music Time: 20 hours •Standby Time: 6 months (180 days) •Battery Capacity: 140 mAh •Transmission Frequency: 2.4 GHz •Product Dimensions: 56 (L) x 25 (W) x 13 (H) mm •Charging Interface: Type-C Package included: •1 x Headset •1 x Charging Cable •1 x English Manual