【Product parameters】 Brand: ESSAGER Material: ABS+PC+TPU Interface specifications: Type-C,3.5mm Function: Bluetooth 5.1 Battery capacity: 140mAh Transmission distance: 10 meters Color: Black 【Product Features 】 1. Bluetooth 5.1, receiving and transmitting two-in-one, support a variety of protocols, miniature and compact, long battery life 2. Receive (RX)/transmit (TX) signal two-in-one, free switching, multi-scene application 3. Bend-resistant plug, applicable to multiple environments