Product Name: Bluetooth-Compatible Handset Working Voltage: DC 4V Battery Capacity: 200mAh Talk Time: Up to 12 Hours Standby Time: Up to 36 Hours Charger Input: DC 5V, 300mA Frequency Range: 2404-2479 MHz Communication Distance: Up to 10M (Open Area) Charging Time: Approximately 2 Hours Product Introduction: 1. Power On: Press and hold the function button until the blue and red indicator lights turn on and flash simultaneously. 2. Bluetooth Pairing: a. Enable Bluetooth on your mobile phone. b. Search for available devices. c. Select the device name from the list. Once connected, the blue light will flash steadily to confirm successful pairing. 3. Answer Incoming Call: When receiving a call, press the function button to answer. 4. End Call: Press the function button to end an active call. 5. Reject Incoming Call: Press and hold the function button for 2 seconds to decline an incoming call. 6. Redial Last Number: Double-click or press and hold the function button for 2 seconds to redial the last dialed number. 7. Power Off: Press and hold the function button until the red light turns on, then release to power off the device. 8. Charging: While charging, the indicator light glows red. When fully charged, the red light turns off and the blue light remains steadily illuminated. Initial charge time is approximately 2 hours. Package Includes: 1 x Bluetooth-Compatible Handset 1 x USB Charging Cable 1 x Packaging Box Note: 1. Due to manual measurement, please allow a slight variation of 1-3 cm. 2. Colors may vary slightly due to differences in monitor displays.