JBL Go 4 Ultra-Portable Bluetooth 5.3 IP67 Waterproof Speaker (Blue Only) $39 + Delivery ($0 with Prime/ $59 Spend) @ Amazon AU

Matching all time low
Thanks Julzx for the mini review: “I have one of these and I highly recommend them. Deceptively loud and clear.”
Price matchable at the usual suspects

Features
Ultra-portable JBL Pro Sound with punchier bass
Up to 7 hours of playtime plus 2 hours with Playtime Boost
Waterproof and dustproof
Multi-speaker connection by Auracast
Made in part with recycled materials
Vibrant color options
JBL Portable app

Technical Specifications
General Specifications
Transducer: 45 mm /1.75”
Output power: 4.2 W RMS
Frequency response: 90 Hz – 20 kHz
Signal-to-noise ratio: > 85 dB
Battery type: Li-ion polymer 3.23 Wh (equivalent to 3.8 V / 850 mAh)
Battery charge time: 3 hours (5 V 1 A)
Music play time: up to 7 hours (dependent on volume level and audio content)
Bluetooth® version: 5.3
Bluetooth® profile: A2DP V1.4, AVRCP V1.6
Bluetooth® transmitter frequency range: 2400 MHz – 2483.5 MHz
Bluetooth® transmitter power: ≤ 9 dBm (EIRP)
Bluetooth® transmitter modulation: GFSK, π/4 DQPSK
Product Dimensions (W x H x D): 94.3 x 75.7 x 42.2 mm / 3.7 x 3.0 x 1.7”
Product Weight: 0.19 kg / 0.42 lbs
Packaging Dimensions (W x H x D): 125 x 103 x 56.5 mm / 4.9 x 4.0 x 2.2”
Gross Weight: 0.32 kg / 0.69 lbs
Maximum operation temperature: 45 °C

What’s in the Box
1 x JBL Go 4
1 x USB Type-C cable
1 x Quick Start Guide
1 x Warranty Card and Safety Sheet