1. Bluetooth Version: QCC3040 V5.2. Supporting Agreement: A2DP/AVRCP. Support Dual Stream Multi-point Connection (TX mode): Support (One Transmitter Connects Two Bluetooth Speakers Or Headphones At The Same Time). 2. Battery Type:300mAh Lithium Ion Polymer Battery 3.Code: RX----- Adaptive/ HD//AAC/; TX----- Adaptive/ HD/ LL//. 4.Receiver Mode For: Car Kit/Wired Speaker/Home Speaker/Power amplifier/Headphone . 5. Transmitter Mode For: TV/PC/Projector/Power amplifier/TV Box /Bluetooth Headphone/Earphone/Bluetooth Speaker . Exquisite appearance of the product; The latest Bluetooth 5.2 technology; Adopt the latest QCC3040 high-end Bluetooth chip design; With LED light display, the status is clearer and more intuitive; With various audio lights, it can identify the audio transmission mode; Support RX, TX dual connection function; 3.5MM audio input/output interface, strong versatility; Built-in rechargeable battery, long battery life; The product connection is simple, without any cumbersome driving and downloading APP; Product Specifications: Bluetooth Version: 5.2 Bluetooth Chip: Qualcomm CSR QCC3040 Chip Audio Codec : //-LL/-HD/-Adaptive Lowest latency: -LL Mode 40ms Low Latency,600/kbps; Wireless Work Range: 10m Frequency response range: 2.402GHZ-2.480GHZ Charging : 5V/0.5A Power Input: DC5V Built-in Battery:3.7V/3000mA Li-polymer Battery Working Time: RX 10H, TX 8H Charging Time: About 2hours Number of connected devices: 2 (TX Mode) Support Dual Stream:Supports Connecting two Bluetooth speakers or headphones at the same time (using the same CODEC), and the dual connection can support up to Adaptive. Material: ABS colour: black Package Contents: 1 x Bluetooth Audio Adapter 1 x 3.5mm Aux Cable 1 x Charging Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.