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 Battery3.Code: RX-----aptX Adaptive/aptX HD/aptX/AAC/; TX-----aptX Adaptive/aptX HD/aptX LL/aptX/.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 independent 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: 5.2Bluetooth Chip: Qualcomm CSR QCC3040 ChipAudio Codec Method: /APTX/APTX-LL/APTX-HD/APTX-AdaptiveLowest latency: APTX-LL Mode 40ms Low Latency,600/kbps;Wireless Work Range: 10mFrequency response range: 2.402GHZ-2.480GHZCharging method: 5V/0.5APower Input: DC5VBuilt-in Battery:3.7V/3000mA Li-polymer BatteryWorking Time: RX Greater than 10H, TX Greater than 8HCharging Time: About 2hoursNumber 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 aptX Adaptive.Material: ABScolour: blackPackage Contents:1 x Bluetooth Audio Adapter 1 x 3.5mm Aux Cable 1 x Charging CableOnly 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.