A. Product Features 1. It uses imported precision electronic materials combined with special long - distance technology, and the maximum effective wireless distance can reach around 300 meters. 2. It is equipped with a stable music chip and loaded with 52 melodious ringtones, enabling the speaker to output pure and relatively high - volume chord music. 3. It features a European and American design style, with a simple, fashionable and elegant appearance. 4. The digital double - panel circuit design ensures relatively stable operation and reliable performance. 5. It has an adjustable four - level volume, which can meet the needs of different environments and various volume requirements. 6. If the remote control button of the transmitter is pressed 5 times a day, its service life can be up to about 25 years. 7. The user - friendly packaging list comes with tape and a bag of screws, so users can install it without additional accessories. 8. It is suitable for places such as homes, apartments, villas, hotels, offices, nursing homes, and hospitals. B. Configuration Methods - **Pairing**: Long - press the volume key of the receiver for 3 seconds and wait for the indicator light to turn on. After it stays on steadily, press the transmitter to complete the pairing. - **Unpairing**: Long - press the volume key of the receiver while plugging in the power. After about 8 seconds, when the indicator light stays on steadily, release it, and all pairing information in the device will be cleared. C. Specification Parameters - **Status**: In new condition - **Material**: ABS - **Color**: Black - **Plug Type**: American 100 - 240V - **Optional Types**: 1 receiver + 1 transmitter; 1 receiver + 2 transmitters D. # Receiver - **Power Supply**: AC 100 - 240V - **Power Consumption**: 0.5W - **Operating Frequency**: 433MHz - **Remote Control Distance**: 0 - 300 meters (in an open environment) - **Volume**: Maximum around 110 decibels (four - level adjustment) - **Number of Music**: 52 - **Dimensions**: Approximately 82 * 82 * 43.6 mm / 3.2 * 3.2 * 1.7 inches E. # Transmitter - **Battery**: 1 x 23A alkaline battery - **Dimensions**: Approximately 74 * 38.5 * 15.7 mm / 2.9 * 1.5 * 0.6 inches F. # Optional Packaging Weights Approximately 135 grams / 4.8 ounces or 160 grams / 5.6 ounces G. # Optional Packaging Lists - 1 receiver - 1 transmitter or 2 transmitters - 1 roll of tape - 1 bag of screws